SCREAM
SEISMOMETER CONFIGURATION REAL-TIME ACQUISITION AND MONITORING

SETUP and DISPLAY OPTIONS

Content

1. Computer System Requirements
2. Preparing the Computer
3. Software Installation

a. The Available Streams Window
b. Using SCREAM's Help Menu
c. Name Your Digitizer

4. Setup Options
5. More Setup Options

a. Sending PEPP Data out via the internet
b. Customizing Stream Names
c. Continuous Printing Setup

6. Viewing Stream Data

a. To View the GPS Status Stream
b. To View the Data Stream
c. The Info Window

7. Viewing Data

a.Using the WaveView Window
b. The WavView Window Task Bar
c. Using the Measurement Curors
d. Multiple WaveView Windows
e. Viewing Sections of Data
f. Zooming In
g."Right Click" Options

8. Replay Files
     
          a.  The File Replay options
          b. Replay Files Example
          c. Pausing Replay
          d. Unpausing Relay
          e.  Viewing Files After Replay loading
          f.  Removing Replay files

9. Getting Realtime Data From the Internet

          a. Using the Network Diagnostics Window
          b. "Pulling" Data from Indiana University
          c.  Removing a "pulled" Data Stream

10. Other Ways to View Stored Data


Computer System Requirements   back to top

This is a Windows 95/98/NT based application; therefore almost any IBM-PC compatible computer suitable for running Windows 95 is suitable and Windows must be installed.

For BETTER performance, the following is recommended:

Preparing the Computer     back to top

Windows 95 or better must be installed, a printer ( shared network printer access is fine) and a TCP/IP network connection are very useful features to best utilize all of SCREAM's program functions.
  Turn off all Screen Savers, Sleep modes and Power Saver options. You will want to have SCREAM continuously display incoming data at all times to see any earthquakes that may happen at any given time. SCREAM will continue to run, storing and displaying data while the computer is in sleep mode however, some power management options may momentarily interrupt the serial port function causing a gap in the recording of incoming data from thePEPP digitizer.

    To Turn off Screen Savers, Sleep modes and Power Saver options:

Move the mouse pointer to the My Computer icon on the desk top and double click with the mouse button on the icon to open the folder.
Move the mouse pointer and double click with the mouse button on the Control Panel icon folder.
Move the mouse pointer and double click with the mouse button on the icon on the screen. The following menu opens: Move the mouse pointer to the Screen Saver tab and click on it to bring it to the foreground. Move the mouse pointer to the down arrow icon and click on it. Scroll down with the mouse pointer to highlight NONE and click on it with the mouse button to choose it.

Move the mouse pointer to "Settings" and click on it, or move the mouse pointer to "OK" and then move the mouse pointer to the  icon and double click with the mouse button to open this folder.

Move the mouse pointer and click on the Power Schemes tab to bring it to the foreground. Move the pointer to the down arrow on Power schemes and click on it. Scroll down with the mouse to highlight none and click on it.  Repeat and choose Never on both, Turn off monitor and hard disks options.
Click on the OK button to invoke these settings.

Move the mouse pointer in the Control Panel menu to the  icon and double click with the mouse button while on the icon to open this folder.
Move the mouse pointer and click on the Device Manager tab to bring it to the foreground.

You may need to move the pointer and click on the circle to choose "View devices type". Look at this list and see if  Advanced Power Management support and the Ali 7101 Power Management Controller are "X'd" out. If they are not, move the mouse pointer to Advanced Power Management Support and click on it to choose it. Move the mouse pointer and click on the Properties button.  This will bring up another tabbed window. Click on the General tab. click in the white box to check mark for Disable in this hardware profile and click on the OK button. then move the mouse pointer and click on the Settings tab. Click on the white box and disable power status polling. Click on the OK button.  Click on the OK button to close the Settings Window.
    If you are still getting data gaps after turning off the Power Management Support:
  The flow control on the serial port that the PEPP digitizer is attached to may need to be changed. Double click on Ports (COM & LPT) to to show all of the available ports and Scroll down with the mouse and click on the port the PEPP digitizer is attached to, to highlight it. Move the mouse pointer and click on  Properties. In the Serial port Properties window, click on the Port Settings Tab:

Move the mouse pointer to the Flow control window and click on the down arrow. Choose NONE for Flow Control, (the PEPP digitizer does not use flow control) then Click on OK.
Click on the OK button to get out of the device manager.

Move the mouse pointer to the  button on the lower  left of the screen and click on it. Move the mouse to highlight Shutdown and click on it. Then move the mouse to choose Restart. This will force the settings to take effect.

SOFTWARE INSTALLATION:   back to top

START SCREAM:
If you followed the procedure on the CD-ROM to install SCREAM on your computer the following procedure will get you started:
    If your PEPP computer does not have a CD-ROM drive, Load the CD on a computer, and use the explore button, from there you can copy the ZIPPED SCREAM program onto a floppy disk to take to the PEPP computer. Unzip SCREAM and follow the procedure below to install SCREAM.

    If you are loading SCREAM from a floppy or other method, Unzip the program, there should be five files. If you use Winzip and see the SCREAM files in the WINZIP menu, (you cannot run install.inf while in the winzip program) be sure to click on the EXTRACT button icon in the top of the Winzip window to place the files in a directory of your choice. Then close Winzip and go to that directory, using Windows Explorer and open it. (To get to Windows Explorer, move the mouse pointer and click on the Windows button , scroll up with the mouse to highlight Programs, move the mouse pointer to the program list and highlight Windows Explorer.)

To Install SCREAM:

    Find the location you stored the SCREAM program files and open the folder. There are 5 files.
 One file will be install.inf. Click on install.inf to highlight it, RIGHT button click while the mouse pointer is INSIDE the Highlighted area and a task window opens, scroll down to the install option and release the mouse. This SCREAM install proceedure will set up the SCREAM program to be in the Windows Program file.

Click on start: go to \Programs \ Guralp Systems\Scream2.3

If you aren't familiar with a windows system, Click on the   button in the lower left corner of the screen, move the mouse pointer up to Programs. A new selection window shows up. Move the pointer into this window, and go to Guralp systems to highlight it. A new window will open up move the pointer into this window and highlight SCREAM 2.3 exe and click on it. This will start the SCREAM program.  The file: Readme.txt contains some of Setup information that is contained in this document and you can read it as a supplement, follow the same proceedure as above and choose Readme.txt to view.
The AVAILABLE STREAMS WINDOW comes up on the screen



If the Available Streams window on your system does not look similar to what it contained above, this document will step you through setting up your system and will guide you through SCREAM'S display options and functions.

THE AVAILABLE STREAMS WINDOW     back to top

This window is the main controlling window for the application. The display is split into two sections, controlled in a similar manner to the Explorer in Windows 95/NT.

The left pane shows a tree view of all sources of streams. Progressive branches of the tree reveal the originating computer, then which serial port the data is coming in, then the originating instrument. By selecting a particular node of the tree, all streams (seismic data) from that node and below are shown in the right pane.

The right pane shows stream details for each stream of seismic data within the selected source (from the left pane).

The gray bar along the top of the Available Streams Window:

File, View, Windows and Help are "pull down" menus that contain various program functions and utilities available to the user.

The three icon buttons in the right corner of the available streams box function the same as in WIN95
The "open box " icon button "maximizes" the program to fill the computer screen.
The "slit" icon button "minimizes" the program off of the computer screen. This frees up the computer to run and display other programs. SCREAM continues to run as normal in the background, data collection and storage continues to take place. The SCREAM icon will be at the bottom of the Windows screen
The "X" icon button terminates the SCREAM program.

Information relating to each stream is displayed in columns. The columns indicate:

Stream ID is the Serial number of the Guralp processor box (digitizer) and is the stream data source.
The stream ID can be re-named, to something that is more recognizable under the setup option "Stream Mapping"
Rec. Shows whether recording is enabled or disabled
Format 8, 16 or 32-bit data format last received for that stream
SPS Samples per Second (should not change). A value of zero indicates a status stream
End Time is the Latest time that data has been received for the stream
Date Current is the date of receive stream
RIC  ‘Reverse Integrating Constant’. In effect, this is the value of the last sample received. This is useful for reading Mass positions or other environmental streams.

The status bar along the bottom of the Available Streams window indicate:
(This is a user controlled information display bar and is displayed only when chosen under the View option in the Available Streams Window.)

The number of data streams.
The amount of memory currently used for stream buffering (for displaying data).
The system time. This time is the internal PC clock adjusted to UTC time (as used by GPS, and the digitizers).

   The WaveView window
May or may not appear on the screen at the start of the program and it may not show a wiggle trace.

USE THE HELP DIRECTORY    back to top

Open the HELP Menu: Move the mouse pointer to Help and left click on this button .The following options appear:
Move the mouse to scroll down the menu options and highlight Contents.

A new window opens containing the Help files on the screen:
This is a completely separate document that is linked to the SCREAM program to help guide you. Use the mouse pointer to click on subjects, and option buttons. This HELP window is separate from the SCREAM program and will not affect the operation of the SCREAM program itself. When in the SETUP menus of SCREAM and with the Help window open, the Help menu button, will  jump to the topic in question for you. This Help documentation provides additional information that will help guide you through the installation process and in the operation of the SCREAM program.
Move the mouse pointer and click on the Help pull down menu and scroll down and click on ABOUT a pop up window comes up:
Tells you wheat version of SCREAM you are running etc.  Move the mouse pointer and click on OK
                                                                                when done viewing this window.

DATA IDENTIFICATION

After you have located the PEPP sensor and digitizer in a quiet location, connected the GPS clock and serial port data cable to the recording computer, applied power to the digitizer and started the SCREAM program on the PEPP computer, the first configuration and set up option to do is to set the proper Station Identification Name internally to the PEPP digitizer. This name is attached to the data stream that comes from the PEPP digitizer (processor box) this name becomes a part of the serial number of the digitizer and makes the have data unique identifier for every guralp digitizer. This prevents data from being inadvertently mixed up with data from other digitizers at central data collection center. The PEPP serial number is already a part of this unique name, being able to add your PEPP STATION ID aids in quick recognition of the data source.

NAME YOUR DIGITIZER     back to top


The above example of the Available Stream window shows in the LEFT window pane, the PEPP digitizer is attached to com2 on the computer named GEOSCI-PEP and has a specific System Identifier (Digitizer Name) and serial number, PPBLO-7019
This ID name is the Stream ID that is SET in MEMORY of the PEPP digitizer. This is the unique identifier that is tied to all seismic data that is generated by this PEPP digitizer. You MUST give your PEPP digitizer a unique name in order for your station data to be properly identified when sending and recieving data over the internet.

NOTE: If the right pane of the Available Streams window is blank you will need to first set up the COM port to recieve data form thePEPP digitizer. Go to the SETUP OPTIONS instructions and follow the instructions to get to the SETUP MENUS (the SETUP menu options can be done in any order) then click on the COM port tab and follow the instructions to set up the com port the PEPP digitizer is attached to. After a few moments, the stream ID should show in the Available Streams window and you can now name your digitizer. Set Up Comport

For SCREAM 2.2 software version:
   For SCREAM 2.3 sofware version:   Note the latest version of SCREAM no longer supports the following configuration option for "old" PEPPV digitizers (those with serial numbers beginning with 70..) Please go to  Name Your Digitizer with SCREAM 2.3 and follow that procedure.  


 

To give your PEPP digitizer a name, use your assigned PEPP Station ID.
Move the mouse pointer to current name of the PEPP Digitizer just under the terminal symbol and com port symbol in te LEFT pane of the  Available Streams Window (it may say FAILZ4 or WOO…) and click on it to highlight it.
With the mouse pointer INSIDE the blue highlighted section,
RIGHT Click while on the highlighted name. A dialog box will open:

Drag the mouse pointer down to highlight Configure and click on it.

A new  window will open up:
wpe2.jpg (14744 bytes)
 

Move the mouse pointer into the System Identifier window and click in the white box.

Type your PEPP station name in the window provided. The Serial Number should match the serial number on your PEPP digitizer. Type the serial number in the window provided, if needed.

Move the mouse pointer and click on the DOWNLOAD button.
This sets the System Identifier name in the PEPP digitizer.
After a moment,
The PEPP station name should now appear in the left pane of the Available Streams Window followed by a dash and the serial number of your PEPP digitizer.

Name Your Digitizer with SCREAM 2.3

Go to the "files" Pull down menu located in the upper left corner of the Available Streams Window, just under the words "Available Streams" in the blue bar and click on it.
Move the mouse pointer down to highlight and click on Terminal. A dialog box opens:

 Verify the correct com port and that the Baud Rate is set at 9600. Use the down arrow icon with the mouse to choose the correct com port and use the mouse pointer and click in the Baud Rate window and type in the correct Baud Rate if needed. Note SCREAM will check for the correct com port, so editing what is in this dialog box may be unnessary.
Click on OK
A terminal session will be established between the computer and the PEPP digitizer box: 
 

If you hit the Enter key the digitizer will respond with ok.
Some digitizers may say WO0791 701500 or PPBLO 7015  The important thing is the words "Command Mode".
At this point, type:
ok-1 (hit enter)

The digitizer responds with:
Forth Vocabulary now available
Guralp Systems Ltd - PEPP-534 \v.20 mgs 02/02/98     ok

The system is now ready to accept your commands. type all characters, commas and spaces exactly as written!
To change the digitizer name and or serial number, type:

set-id (hit enter)

The system responds with: asking for a system identifier name. You type your PEPP station ID followed by a comma. For example:

System Identifier?  (e.g. ALPHA,) PPBLO, (hit enter)

The digitizer responds with asking for a serial number. Type your PEPP digitizer number (found on the back of the digitizer box) followed by a comma and two zeros.
Serial #? (e.g. 1234,00) 7015,00 (hit return)

The digitizer responds by reporting the new System ID and Serial Number:
PPBLO 701500  ok

If you make a mistake, hit the enter key and repeat these steps. Your changes will take effect when the digitizer is re-booted.

Re-boot the system: Type:

re-boot (hit enter)

The system responds with:
    Are you sure you want to re-start the system (in the new configuration) - Yes/No? Type:
y (hit enter)

The digitizer responds saying the changes will take effect in a few seconds.
Exit the terminal window by moving the mouse pointer and clicking on the "X" icon in the upper right corner of the terminal window.

If you get:  ? is undefined you have made a mistake, simply type ok-1, hit enter and re-type your commands. Sometimes the digitizer won't accept the changes on the first or second try (sometimes because of typing errors other times ???). Re-enter the process to set the id until the digitizer accepts the changes. If this does not work, install SCREAM 2.2 and use that proceedure to configure the digitizer. Still have problems? send email to: tstigall@indiana.edu

SETUP OPTIONS   back to top

Move the mouse pointer to File and left click on this button .The following options appear. Move the mouse to scroll down the menu options and highlight SETUP. Release the mouse button.


The Setup window (dialog box) opens up:
 

                               THE SETUP MENUS

This window is like "tabbed" index cards.
Clicking on a subject tab brings it to the front to view and allows changes to be made to the settings of the SCREAM programs.
The buttons on the bottom of the Setup window:
"? Help" Brings up Scream's, Help program and explains options and settings.
"X Cancel" Breaks you out of the Setup window without invoking changes you may have made in Setup.
"Apply" Invokes the changes you have made and the changes are saved to disk without exiting the Setup window.
"OK" Has the same function as Apply, except it closes the setup window, putting you back to the Available Streams window.

Click on the "Display" tab it will look like the setup window above:

Move the mouse pointer to the window in "Stream buffering".
Click on the Buffer window (highlight it) and type:

999 minutes of stream buffering.

In order that the program can re-draw the wave forms, some history must be buffered in memory. This value determines how many minutes of data per stream are buffered. Note that the larger the value, the more memory is used. This value also determines the display range available during "pause mode" and in replay "pause mode". One minute of data from one stream at 16 bit compression, and sample rate 100 would use approx. 13 Kb of memory. 999 minutes of stream Buffering uses about 1Mbyte of memory.

Mux Scaling
Click in the box to check mark this option. This is useful when a "Mux" channel is used as a calibration output.

WaveView Defaults: This section can be skipped, you can come back to it and make these changes anytime during the operation of the SCREAM program.
    These options allow you to choose the color of the WaveView window, the background color and the color of the wiggle trace. The default colors are shown: the background is black and the wiggle trace is green for the vertical component data stream.
You can change the default settings to such that the WaveView window will always open with the colors you choose.
To change the wiggle trace color, move the mouse pointer and click on the component "Z" for one component  vertical only PEPP's you want changed,
a color palette window comes up:
The LEFT side of this window shown below will appear. If you want to choose a custom color that is not shown in the boxes choices, move the mouse pointer and click on:

and the RIGHT side of this window will show the color hues (rainbow) and Intensity bar will show.

Move the mouse pointer and click on a color box to choose it or move the mouse pointer to the "target" icon in the rainbow, click on it and hold the button while moving the mouse around the rainbow to the color you desire which will show in the 'Color|Solid' box. Then move the mouse pointer to the Intensity bar Arrow, click on it and hold down the button while moving the mouse up and down the bar to choose the intensity and release the button. Click on "Add to Custom Colors" and this custom color will appear in a Custom colors box  in the left of the window.
Move the mouse pointer to a color box you choose and click on it.
Then Click on OK to choose this color as the default color.
    Each time the SCREAM program is re-started it will use the color you chose for the wiggle traces as the default color in the WaveView Window.

To change the default color of the background of the WaveView Window:
You must first have a WaveView window OPEN. If you do not have a WaveView  window on the screen, go to the Available Streams window, move the mouse pointer to the Windows pulldown menu and click on it. Scroll down to highlight New WaveView  Window and click on it. A WaveView window will open up. Once you have a WaveView window on the screen, move the mouse pointer to anywhere on the background color of the window. RIGHT click with the mouse button and an option window will open:
  Use the mouse to scroll down to choose Background Colour and left button click on that option. The same color options box will open as above. Follow the same procedure as above to choose the desired background color for the WaveView window.

To make this color the default color each time SCREAM is started, go to the  DISPLAY option page and click on the SELECT button. Then move the mouse pointer (It will change to an UP arrow) to the open WaveView window and click on the background of the Waveview window. A new dialog box opens up:
Move the mouse pointer and CLick on OK
 

Click on the Apply button when finished with this setup option page.
 
 

CLICK on the Com Ports tab:

The Com Ports dialog box opens up:
The SCREAM software must know which com (serial) port the PEPP processor box is attached to via the cable connection between the processor box and the computer.

Any number of serial COM ports can be opened simultaneously for data reception. To open a port, simply specify the BAUD rate desired by clicking on the port label, and selecting the desired baud rate from the pop up menu. To close a port, select (none) for the baud rate.

The following steps establishes that connection:

NOTE: The BAUD RATE MUST be set to 9600 for PEPP processor boxes.

Move the mouse pointer to highlight a com port i.e. Com1. Left click on the com port and a new window opens up: Move the mouse pointer into this window, highlight and Click on 9600.

If the computer has no other devices connected to the serial ports, repeat the above steps for all the available com ports. Otherwise you will have to establish which port to set to 9600 baud to establish a communication link to the PEPP digitizer. You can do this most easily by trial and error. Set  a com port to 9600 as directed above, move the mouse pointer and click on OK to exit the SETUP window, then wait a few moments, 15 to 30 seconds for the Data Stream from the processor (digitizer) box to appear on the Available Streams window. If it doesn't show up, re-check that the serial port cable connections between the digitizer and the computer are good, make sure power is applied to the digitizer box and the LED's are blinking on the front panel. If the data steam still does not show up, go back to the Com Ports Setup menu and try another Com port as directed above and set it to 9600 baud.

NOTE:
Ports that are not available to the program are not displayed in the list. Ports may not be available if they are not installed, or the Windows 95/NT driver is not installed, or is in use by another program.

Note, that if a DOS application using a serial port has been run from a DOS window, and that window is still open, then the port may not be available, even though the application has terminated. Close the DOS window to free the port for Windows programs.

Check mark to enable EACH option box :
Move the Mouse pointer to the boxes and check mark each of them. The PEPP digitizer uses all of these options in its communication with the computer.
NOTE:
The PEPP digitizer uses only one baud rate so auto baud detection should be disabled by check marking this option.  Back to Naming Digitizer

Click on the Apply button when finished with this setup option page.

Click on Files tab:

The options on this page allow control over the generation and storage of files.

Base Directory:
Specifies the root directory for data files to be saved in. Files for each stream are stored in sub directories off this root. The name of the sub-directory is the Stream ID or the "alias" name for the stream ID.

Decide the location where you want the SCREAM data to be stored. Name the DATA directory whatever you wish. Move the mouse pointer and click to highlight the Base Directory field. Type the location in the field provided. Use a dos directory tree path format. C:\DATA  Depending on your windows version or directory tree a "\" may need to preceed your data directory name. If SCREAM tells you it can't record data that the disk is full or read only you may need to add this 'slash' before your data file name.

Check mark:
Use Formatting
This allows the data file names be named in a year, month, day, hour format that is easily recognized. Other formats can be used, see Help; format specifier for details.

Choose: Hours
The data files can be any number of hours long.
 In the option box just to the LEFT of the HOURS ( top box of the three stacked boxes in the middle) use the mouse pointer and click on the up and down arrows to choose or highlight the window and type in the number of hours you want your data files to contain. One hour data files is recommend for PEPP schools. Keep in mind the display buffer is limited in size and having a data file that is long may mean not all of the data can fit in the WaveView window to be displayed when using WaveView window in Replay mode. Whether 1 hour or more is chosen does not really matter, because the program, GCFinfo, will allow data files to be combined and time sections "cut" to make new "Notable Event" files of your choosing.

Granularity: The PEPP digitizer stores the data at 20 Samples Per Second (SPS).
The size of the data files can be chosen to be in Minutes, Hour files or in Kilobytes. See the help menu for explainations of these options.

Data Format:

Choose: (.gcf) Guralp Compressed Format, this is the data format standard that the manufacturer uses that is specific to their data manipulation programs.

NOTE: SCREAM and GCFinfo can only interpret data files in GCF format. Other formats can be chosen, by moving the mouse pointer to the arrow button and highlighting one of the other data formats listed. If another file format other than GCF is chosen, all stored data can no longer be viewed (replayed) by using SCREAM or GCFinfo. Other seismic data manipulation programs will have to be used to view and manipulate the seismic data.

NOTE: Another program that is provided to PEPP Schools called GCFinfo has the option of viewing all .GCF data files. GCFinfo allows the user to combine files and "cut" data containing notable events and store it in PEPP format to upload to the Princeton database. Other earthquake data formats can be chosen as well.

PEPP PROGRAM SCHOOLS SHOULD USE .GCF FORMAT TO BEST UTILIZE SCREAM'S PROGRAM FUNCTIONS AND THEN USE GCFINFO TO "CUT" EARTHQUAKE EVENTS AND CONVERT THEM INTO PEPP FORMAT FILES.

PEPP DATA Storage Format:
The example shown in fig. 7 designates data will be stored in one hour long files using the file names that are named by the Year, Month, Day, Hour. These are stored in a sub directory called 7019Z4 or the "alias" name you made for your data stream. 7019z4 is the serial number of the PEPP digitizer from which the data originated, "Z" identifies it as the vertical component data, that is in a sub directory called SEISDATA, which is in a directory called SCREAM, which is located in the ‘D’ drive.

Below, is what the data files look like using formatting and .gcf, under Windows Explorer;


 

Each file is one hour long and each file is identified by the year, date, time and hour, with .gcf indicating the data is a GCF format data file.

CLICK on the Recording tab: The recording options dialog box opens up.

The options on this page allow control over the general recording parameters.

In the Streams section of this window:

Check mark by moving the mouse pointer and clicking on the box:

Auto Record-Enable for Data Streams:
This allows auto recording for the data streams.

Auto Record-Enable for Status Streams:
This enables all new status streams detected will have recording enabled by default (Set to ‘Yes’). If not selected, auto recording will not occur. Note that this does not affect streams that are already in the stream list.

The PEPP digitizer does not use the rest of the options listed. If all the options are check marked, SCREAM
will still function normally with the PEPP digitizer. You can find information about these options by clicking on the Help button.

The Recording Mode Section:

   Specifies the action to be taken when the amount of free disk space on the recording directory is below the pre-set level as set by the user. Use the mouse pointer and click on either the up or down arrows to scroll to the number of Mbytes of free disk space you want free, or click on the white box to highlight it and type in the number of Mbytes of disk space you want left free.

How much disk space you want to leave free depends on your disk size and what other program file space you may need to run other programs on your computer. 20-30 Mbytes free is the minimum recommendation for Windows.

Choose one of the two following options:
Stop on Disk Full: will force recording to stop of data streams. SCREAM will continue to run and display data, but no data will be stored to disk once it is full. Choosing this option requires that the user will have to periodically delete data files to make space available for SCREAM to have space to save new data. Data files the user wishes to save will need to be saved or moved to another storage medium.

Ring Buffer will delete the oldest file in the currently used directory and SCREAM will continue to write new data files onto disk. This is the preferred option used by most PEPP users as files that contain notable events are saved by the user into other folders, other storage medium or SCREAM data is sent to be saved on another network computer.
Move the mouse pointer to the option you prefer and click on the circle. A black dot indicates the option chosen.

Click on the Apply button when finished with this setup option page. These are the minimum settings that are necessary to get the SCREAM program running displaying and storing your seismic data.

At this point you may leave the setup window and follow the Viewing Data Instructions on how to display your wiggle trace in the WaveView Window or you may continue with the SETUP procedure until all are completed.

It is strongly recommended that all of the SETUP options be viewed and set to take advantage of all of SCREAMS capabilities and to better understand the SCREAM program.

The SETUP Menu may be pulled up at any time the SCREAM program is running to invoke or change settings.

Click on the Apply button when finished with this setup option page, then go to:

MORE SETUP OPTIONS to continue with the setup menu.
OR
Click on the OK button to leave the SETUP menu and follow Viewing Data with SCREAM to view your data now.
 
 

MORE SETUP OPTIONS     back to top

If you are returning to the SETUP options in the Available Streams Window move the mouse pointer to the "Files" pull down menu. Click and hold the mouse button and move to highlight Setup and release the mouse button.
 

Click on Network tab:   Note: This page is not visible if a suitable network is not installed.
SCREAM allows data to be stored and displayed locally and at the same time send the data to be stored and displayed to remote locations via an internet connection.

If your PEPP computer has an Internet connection, the following options can be allowed:

    If a TCP/IP network connection is available, blocks of data can be sent and received over a network.

    These options enable any network connected PC that is running the SCREAM program to get the data stream from any network connected PC that is attached to a PEPP Digitizer.
     These options allow any number of computers to connect to the local Guralp system computer and "pull" data from it without interrupting local data storage and display. The "pulled" data received by a remote computer running SCREAM can be displayed and stored independently.
Also, multiple data streams from different network connected PEPP stations can be received by one computer.
This allows data streams from a network of remote sensor locations to be collected at one central computer.

Check mark:
Allow network connections This option allows for multi-host networks data block recovery and it allows remote access to the locally connected PEPP digitizer. If a network should go down for a short period of time and come back up, a remote network computer running SCREAM can recover the lost blocks of data that are stored in the digitizer. This recovery will not disrupt the current collection of seismic data at the local PEPP computer. This option also allows a remote network computer the ability to communicate with the local PEPP digitizer via a terminal session.

Transmit all data received from serial ports
This allows the PEPP computer to transmit stream data blocks coming form the PEPP processor box via the serial port to a network environment so that other computers running the SCREAM program can get data via the network connection.

   Receive stream data from network
This allows the SCREAM program to receive stream data from the network. When the above option is check marked, any number of computers on a network that are running the SCREAM program can receive the PEPP computer's stream data this way. SCREAM’ s functions and utilities work the same as with data coming from a serial port, thus allowing the possibility to display seismic data and allowing for multiple data storage locations to take place on other computers, besides the PEPP computer (the computer to which the digitizer is attached). SCREAM can also receive stream data
from the network from other PEPP digitizers; each identified in the Available Streams Window by their unique Stream Id and name.

Port Number: Allows specific ports to be chosen.

NOTE: Each computer will only receive data if it is on the same port number as the PEPP computer(s). The port number
acts as an access number. Data can only be shared between computers that have the same port number. This option can be used to isolate PEPP networks from each other.
This number must be a four digit number.

Choose: Port Number 1568 or the port number as specified by your HOST institution (This is the number chosen by Indiana University PEPP Instrument Center). Move the Mouse pointer to this field, click in it and type 1568.

Note: For PEPP computers to be able to send and receive stream data to each other, the Port Number MUST be the same for ALL computers and the above options must be check marked.

SENDING PEPP STREAM DATA to other computers via an Internet connection:    back to top

    The above settings allow data to be passed between systems running SCREAM over the internet. The next section allows a mechanism where Guralp Systems running SCREAM can send data to other types of computer systems that act as a central data collection point. The data collection center may be a UNIX or other operating platform computer that usually runs powerful data processing software to aid in the management of data storage and retrieval.

Note: SCREAM sends data out to the network in a compressed format in single data packets about once every 15 seconds. Sending out stream data to a specific destination or in broadcast mode functions independently of local data display and storage and this process occurs independently of data being passed in "Pull" mode between computers running SCREAM.
See the help section in SCREAM for more information on these functions.

To Send data to a specific computer anywhere via the Internet, type in the field provided, that computer's IP address:

Choose:
   Specify Destination IP Address: move the mouse pointer to the white circle and click in the circle,
                                                            a black dot  signifies this option is chosen.
Move the mouse pointer to the address field and type in the IP address of the computer you want data to be sent to.

NOTE: The Indiana University Instrument Center has a UNIX computer set to receive stream data and save the data continuously. Any PEPP station running the SCREAM program and has an internet connection is welcome to send data to IU.
    The Indiana University PEPP Instrument Center is storing all data that is being recieved and has a unique data processing progrm running to analyize the data signals and redisplay all PEPP stations together being recievedon one display window. This window can be viewed by PEPP schools, see the additional documentation that was provided to PEPP schools or send mail to: PEPP@indiana.edu for more information.

To send your station’s stream data to Indiana University, move the mouse pointer in the field provided click in it and type 129.79.146.56, if you send data here, please send an email to tstigall@indiana.eduPlease name your digitizer, Tell us your Station Digitizer Name and your digitizer serial number (Unique system Identifier) in the email.  This will help us find your data stream and enter into our data storage management system.

The next option disables the above option and is NOT RECOMMENDED to use because of that, but it does allow a way to send data to any number of computers in a given network that is running the SCREAM program (There is another preferred way to display data in multiple locations and instructions will be described in a different menu option).

When Broadcast to all IP addresses is chosen, SCREAM sends stream data out the network to all computers in a given network. Most system networks block broadcast data from leaving a local network, thus stream data doesn't leave the local network and it is "out there" available for any local network computer to receive stream data from the network.

Note: Each computer receiving data from the network must have it's setup parameters set to "receive data from network "and the port number must be set to be the same as the sending computer.

Choose: Intel, Tx Byte Order move the mouse pointer to the white circle and click in the circle (a black dot signifies this option is chosen).

    This option allows the user to select the byte order for all network transmitted blocks. This can be used to match the data order( "Little Indian or Big Indian") to that of the receiving system, allowing for more efficient processing.

For more information on using the network options, see Network Connections and Advanced Networks in Scream's help section.

Click on the Apply button when finished with this setup option page.

CLICK on the Event Log tab:

The Event Log setup dialog box opens up:
The SCREAM program creates an error log of problems that might occur.
Two different types of events are logged: those that are specific to an incoming data stream and those detected or generated by SCREAM itself.
By default, all events are recorded in a file called ‘error.log’

Choose:

Enable Event log
To select which of the error conditions are logged, select or clear the appropriate box. To do so, by moving the mouse pointer to the white box and clicking in the box.
All error event options Note: not all of  these error reports apply to the PEPP system and will never be generated whether selected or not. See SCREAM’S HELP menu for a detailed description of each of these conditions.

Log Files Option:
File for each data source: If selected, then each log message is recorded in a different file, depending on the type called
Scream.log . This file is automatically generated by SCREAM and contains other helpful diagnostic events pertaining to the SCREAM program. These include, whenever the Application starts and stops, etc.

Limit to:
If Scream.log is selected (check marked), when any of the above files reaches the specified size (n) Kb, the file will be renamed to ‘.OLD’, and a new ‘.LOG' file started. Any existing ‘.OLD’ file will be discarded.
Move the mouse pointer to the window and click to select it or click on the arrows to scroll or type in the desired file size.

Directory:

Type the directory location for these files to be stored. This can either be typed in, by moving the mouse pointer and clicking in the window provided or by selecting from the ‘Browse...’ option.
The default location  is C: Windows \ Temp

Click on the Apply button when finished with this setup option page.

CUSTOMIZING DATA STREAM NAMES   back to top

CLICK on the Stream Mapping tab:    This option allows the user to rename the stream ID for each data stream in the Available Streams Window. This is particularly useful when multiple PEPP stations are being collected at one computer to give each data stream an easily recognized identity rather than just a short code name and serial number to go by. This step is optional. If you do not want to rename the data stream, skip this option by clicking on the OK button.
NOTE: This option does NOT change the Unique SYSTEM IDENTIFIER of the PEPP digitizer you set in the "Name Your Digitizer" instructions. The Unique System Identifier for each PEPP digitizer is still the name that is a part of each data file and cannot be changed.


Stream Mapping allows the user to set ‘aliases’ for the labels of incoming data streams.

This "alias" once set ,will appear in the Available Streams window (right pane) as the data stream name. The name will also be used in the WaveView windows, and on page printouts.
CHOOSE:
Move the mouse pointer and click on the white box.
After Stream Mapping is chosen, the Setup window changes to look like the tabbed stream mapping window above.

NOTE: Certain characters cannot be used in the data stream name you choose. The mapped text is also used to generate the directory name for the recording of the data stream. This restricts the range of characters than can be used.

The following characters are not allowed in file names:

\ / : * ? " < > |

Click on: Add
Move the mouse pointer and click on it.

A new window will open up:
Move the mouse pointer into the field provided click in it and Type the stream ID from the Available Streams
                                                                        window you want to change.
Click on OK.
A new window opens.
    Move the mouse pointer into the field provided click in it and type the new name or "alias" you want it to be.
 Keep the number of characters too less than 8 because the labels in the WaveView window automatically scale down in size to fit in the panel. If the ID name is too long it could make long text appear too small to read.

Click on OK
The Steam Mapping window now displays the "real " stream ID and the "alias" you assigned to each stream ID for reference in this window.

You can can add or delete alias names for as many streams as you prefer.
 To remove a mapping or alias name, select the mappings to remove, by moving the mouse pointer to
  the input ID and highlighting it. Then either click the ‘Remove’ or use the ‘Delete’ button.

 To edit a mapping, rename it,  move the mouse pointer to the Input ID you want to change and
select and click ‘Edit’or double click on the name.

The "new name window" will open up and allow you to change the name for the Stream ID.

VERY IMPORTANT:
MAKING AN ALIAS CHANGES THE DATA STORAGE LOCATION:
Note: This "alias" becomes the directory name in SCREAM version 2.2.
     If you set an alias in a PEPP system that already has data stored under the original Stream ID or as a different Alias, then the
path to the old data will be lost!
    SCREAM won't be able to write over the oldest data if it’s set to Ring Buffer under the Recording tab:.
SCREAM will write over the oldest data in the new directory name (new alias name) only.
    Set the alias name when you are first setting up the SCREAM program to avoid having multiple data directories for the same data stream source.
 Or you may want to delete the old data directory or copy the old data into the new directory name to save disk space ans be able to have Scream write over the oldest data files.

NOTE: When using an alias, SCREAM will use the "real " identifier (stream ID or PEPP digitizer name in) all internal referencing (this prevents data from getting mixed up or separated from it's true digitizer source) thus, some of the sorting options in the Available Streams window will not function in the same manner when using Alias names. This is a minor inconvenience when you have multiple data streams coming in and wish to easily recognize the data source.
Go to SCREAM's HELP menu for more information about STREAM MAPPING.
 

Click on the Apply button when finished with this setup option page.

CLICK on the Email tab:

The SCREAM program can send alert email to a specified user to notify them of chosen significant events in the operation of scream or the instrumentation.

NOTE: This page is not visible if a suitable TCP/IP network is not installed.

To implement this option: Move the mouse pointer and click in the field of the SMTP (Simple Mail Transfer Protocol) Server box enter a server name or IP address for outgoing email.

If you don’t know this address or IP number ask your Computer Support Person.
Recipient:
Move the mouse pointer and click in Recipient box and enter the email address that the messages are to be sent to.

Check mark:
  Events to Monitor: Move the mouse pointer to the boxes and click on them to choose the "Events to Monitor" that you wish email notification for.
Note: not all of  these events apply to the PEPP system and will never be generated, whether selected or not. See SCREAM’S HELP menu for a detailed description of each of these conditions.

Click on the Apply button when finished with this setup option page.

CLICK on the Print tab:
    The WaveView Window has a print option button that prints The WaveView Window display to a printer, if one is available under the WINDOWS operating system.
No changes need to be made to this SETUP page unless direct CONTINUOUS printout of the wave form is desired.

CONTINUOUS PRINTING SETUP   back to top

To allow a continuous printout of the wiggle trace, this option, requires an Epson type printer be attached to the parallel port of the computer running the SCREAM program.
A Windows printer driver is not required for continuous printout, since the direct printer control
uses Epson ESC/p commands.
Click on the Help button for more information about this option.

Click on the OK button.

The SCREAM SETUP options are now complete!

The SETUP Menus may be pulled up at any time the SCREAM Program is running to invoke or change settings.
 
 

Viewing Data with SCREAM   back to top


The right pane of the Available Streams window should show two data streams, as shown above, one for the GPS data stream and one for the seismometer data stream.
To show all of the data streams in the right pane of the Available Streams window, move the mouse pointer and click on a branch and left click on it. From that selected point, all data streams from that branch and below are shown in the right pane.

The Seismometer data stream is labeled INDIANA U in the example shown. If you haven't given your data stream an "alias", the seismic data is
labeled with the system Identifier name  as the  Stream ID which  is the PEPP serial number with "Z4" on the end.
i.e. 7019Z4.
 
 

The View pulldown menu in the Available Streams window gives a number of ways to view information displayed:
Stay on Top keeps the Available Streams window in the foreground , keeping all other windows such as WaveView windows behind it. Don't choose this option.
Status Bar "checked" displays the info in the bottom "grey" section of the Available Streams window. List shows only the Stream Id names in the window, where Details shows all information. Select All and Delete do just what they say to the Data streams in the Available Streams window and Sort By allows you to choose a number ways to list the order of the Data streams in the Available Streams window.

To View the Status Stream back to top

The "status" stream labeled 701900 contains a text file that logs program information. Status stream 701900 is a GPS log file and also records re-syncs and reboots and other information useful for diagnostic purposes. To view the contents of the GPS data stream:

Move the mouse pointer and click on the Stream ID that ends in 00 (in this case 701900). Press the left mouse button (left click) to highlight the data stream.

Press the right mouse button and a dialog box will open.
Scroll down with the mouse and highlight VIEW and left click on it.
A text file will open up and lots of information is available, such as the number of satellites it sees and the drift of the clock, PWM and the angle of the satellites the GPS sees in the sky is listed.
SCREAM will even calculate the latitude, longitude and elevation of the GPS clock’s location periodically within the hour.
These are "quick fix" locations with the Lat. and Long. fix accurate to roughly 5 meters.
Move the mouse pointer to the "X" icon in the upper right corner and click on it to close this window.

THE INFO DISPLAY
Information Window (ViewInfo)

Use the mouse pointer and click on the Windows pulldown menu. Scroll down to highlight  and choose Info Display, a new window will open: This is an information window that displays what is going on during the data processing of SCREAM data. Eack block of data gets processed and checked and any errors get logged in the appropriate log files.
Every incoming block is decoded and the header information is displayed in this window. A number of checks for validity are made, and any fields which appear invalid are shown in red. Consult SCREAM'S HELP menu for more information about this window.
To close the window use the mouse pointer and click on the "X" in the upper right corner of the window.

 
 

To View The Data Stream  back to top

                                            The WaveView window

If there is a WaveView window on the screen, move the mouse pointer to the WaveView window and click on it to bring it to the foreground. If there is no WaveView window on the screen there are THREE ways to get one on the screen:

Changing the size of windows
The size of WaveView windows can be changed by moving the mouse pointer to any window frame edge and the mouse pointer icon will change to an "opposing" arrow icon. With the opposing arrow icon, click and hold down the mouse button and "drag" the edge in and out by moving the mouse. Click on the "Open box" icon in the upper right cornerof the WaveView window and the WaveView window the fill  the screen. You'll have to click on the reduce button to be able to see and open other windows on the screen.
Opening WaveView Windows
One way to open a WaveView window is to move the mouse pointer to choose it form the pull down menu in the Available Streams window labeled Windows.
Click the mouse button on Windows, then move the mouse button down to highlight New WaveView Window and click on it.

The WaveView window will appear on the screen but it will not have a data stream displayed in the window.
The data stream, 7019Z4 or Indiana U in this example, must be moved into this window in order to view the wiggle trace.
Go to the Available Streams window and "drag and drop" the data stream In the RIGHT window pane, into the WaveView window.

To "drag and drop", move the mouse pointer to the data Stream ID and click on it to highlight it, while holding down the mouse button "drag" the data stream by moving the mouse, into the WaveView window field and release the mouse button "drop".

Note: You may need to "arrange" the windows around on your computer screen on order to "drag and Drop" from one window to another. You can use the "minimize" button to close windows but leave them open and will show on the task bar on the bottom of the screen or use the "X" icon on the upper right corner to close the windows

To Arrange the Windows on the Screen
Simply move the mouse pointer to the BLUE bar on the top of each window, then click and hold the mouse button down while moving the mouse. This will move the window to any position you want it on the screen. You can do this for any window that is open on the screen. Click on any part of any window to bring it to the foreground. If the WaveView window stays behind the Available Streams window, move the mouse pointer to the Available Streams window and click on the View pull down menu scroll down and click on and "un-checkmark", 'Stay On Top'.
 
 

Another Method to Open a WaveView Window WITH a Data Stream

The second and easier way to get the data stream to show as a wiggle trace in a WaveView window is:

Move the mouse pointer to point at the Stream ID in this example, Indiana U and click while ON it to highlight it, then Right Click while the mouse pointer is inside the of the blue highlighted area of the Stream ID and a dialog box opens up:

Move the mouse pointer down to highlight View and click on it.
This operation simultaneously opens a WaveView window and puts the data stream in it.

The other options in this dialog box will start or stop recording of the data stream to disk or delete the data stream from the Available Streams window.

Another Method to Open a WaveView Window WITH a Data Stream

DOUBLE CLICK ON THE STREAM ID IS ALL YOU NEED TO DO with SCREAM 2.3!

The third and EASIEST way to open a WaveView Window with SCREAM version 2.3 is to move the mouse pointer to the data stream and "Double Click" on it. A new WaveView window will open with the data stream in it.
 
 

VIEWING DATA    back to top

The WaveView window allows the user to view real-time seismic data "on-the-fly" as it is processed and stored by the SCREAM program. The user can change the time scale, change the amplitude and filter the wiggle trace, any time and "on the fly", without interrupting the data recording process.
NOTE:
Any number of WaveView windows can be opened and any single data stream can be viewed simultaneously in many different windows and different data streams can be viewed in one window or in different windows all at once.

    To open additional waveView windows REPEAT any one of the processes described above to open several different and independent WaveView windows.
        Note: The windows will be placed directly ON TOP of each other if the WaveView window is not moved and you must click on the top one and "drag" it to another location on the desk top to reveal the WaveView window beneath it.

The data that is displayed in the WaveView window is completely separate from the recording process. You WILL NOT destroy the recording process while in the WaveView Window.
    For each WaveView window that is opened, data must be buffered in in order to display it. Thus you will find at times there is not a large data stream  to view at all times. This is because the buffer is in th eprocess of filling or it was full and has started over with new data.
Use the mouse button to click on different buttons to see what each does. A small descriptor will show momentarily when the mouse pauses on a button.
  NOTE:  Some versions of Windows 95 will not show the "button icons" until you pass over the area where they are located with the mouse. They ARE there and the buttons DO function. Move the mouse pointer to the task bar (gray area) where the buttons should be and pause a moment, a small text descriptor will will momentarily show and tell you what button you have found.

    You can download a "plug- in" or patch from microsoft.com to add to Windows 95 that should enable the buttons to show at the following location on the GURALP web page: There's a note about this this on the bottom of this web page at:

http://www.guralp.demon.co.uk/software/winutils.htm

mentioning the update. You can download the patch from microsoft.com by clicking on the link listed on the GURALP web page.

The WaveView Window Task bar       back to top

Consult SCREAM's HELP window, click on WaveView, for detailed information about the WaveView window options.

    Amplitude: 

     The magnification of the wiggle trace can be increased, by clicking the mouse pointer on the opposing arrows button or decreased by, clicking the mouse button on the converging arrows button. to change the amplitude scale anytime and  "On-the-fly" in the WaveView  window move the mouse pointer on the arrow buttons and click on them as many times as desired to ge tthe amplitude desired.

The relative magnification ratio is shown by the numbers displayed between the two scale buttons which are "counts".
For PEPPV sensors the conversion factor to use is:
Sensor Sensitivity: 1206V/m/s
Output sensitivity: 2 x 10 e-9 m/s/count           back to top

     Time Scale: 
The time scale can be modified by zooming in or out.
By zooming in, clicking on the opposing arrows (spreads out the time scale), provides an overview of the display over several hours may be seen.
Zooming out, clicking on the converging arrows (squeezes in the timescale),allows anything down to a few seconds of data to be studied in detail.
This can be useful for estimating frequency (period) of individual waves.
The relative scale factor of the time display is shown by the digit displayed between the two scale buttons.

The appearance of the entire display can be adjusted by using both the Wave Amplitude and Time Scale buttons.

     Band pass Filter:  Click on it to select or unselect, the filter.
The filter option allows a band pass filter to be applied to the stream wave forms as they are drawn.
In this version of SCREAM, this filter is fixed at:
The corner frequencies of,  0.1 and 0.9 of the nyquist frequency of the stream.
This filter is useful when displaying a broad band instrument, when long period signals are preventing a ‘flat’ display.

     Pause: 
This control will stop the screen display from advancing, but SCREAM will continue to record seismic data into memory.
A scroll bar appears at the bottom of the window, which can be used to move up and down freely within the stored waveform. You can scroll back to see what has moved off the window display. Pausing, in conjunction with the time scale and amplitude buttons can be used to closely examine any part of a recently received wave form.
The range covered by the scroll bar is the data held within the memory buffer.
You can "blow up" any section of the wiggle trace while paused by clicking and dragging  the mouse pointer over the desired location. Move the mouse pointer to a location a little before and above or below the desired section of the wiggle trace you want to "ZOOM IN" on. then  click and hold the left mouse button down while dragging the mouse, a growing box will show, to "BOX" in the desired section you want blown up. Release the mouse button. This will "blow up" that section. The actual magnification will be shown in the time scale window.
To restore after enlarging, simply click onto the "zoom out" (opposing arrows) time scale button several times as needed.
To return to the real-time display, click on the Pause button again.

Clicking on this button removes any DC offset that may be present. The output from an instrument can, and usually does contain a constant DC voltage. When this output is digitized, it is represented as a numerical offset which is not usually of any significance. In order that wave forms be displayed on a large scale, this offset must be compensated for. This is done by subtracting a constant from each sample as it is plotted. This function affects only the view in the current window, and only to wave forms which have not been locked. The offset is calculated as the average value for all visible data for each stream.
 The Print  button send a page printout of the WaveView window as it is displayed on the screen. The printer must be set up through WINDOWS.

Measurement Cursors           back to top


The horizontal (time) and vertical (Ampl) measurement cursors can be used to take readings from a PAUSED wave form display. A BLACK Waveview window background is best with a LIGHT color wiggle trace. You can change the colors instantly, the instructions on how to change the colors is described earlier in this document.
Click on the  button and a small  white ‘box’(it's green here) appears at the bottom or left of the WaveView window area for the time measurement.
Click on the  and a white box appears on the  upper left of the window.
To measure the time and amplitude cursors and get readings, Click on a box, for instance the time cursor box ,and hold down the mouse button to "drag" the box and time line to the desired section of the wiggle trace. Go back and get the second white box and click and drag it to the desired section you want to measure. The area between the two lines is what is measured and displayed on the upper task bar of the WaveView window.
Do the same cursor "drag and drop" procedure, for the Amplitude cursors to get an amplitude measurement.
A measurement readout is displayed on the upper tool bar of the window:
 The left reading is the time measured in seconds of time between the vertical cursors. The accuracy of these readings depends on the current scaling factor, since at large scales one pixel may represent several seconds. The reciprocal value, the frequency, is also displayed.
 The right reading is the difference in counts between the top and bottom cursors. If the conversion factor of the digitizer is known, this value can be used to determine the input voltage to the digitizer that value is given in the above text.

MULTIPLE WAVEVIEW WINDOW EXAMPLES   back to top

Any number of WaveView windows can be opened and any single data stream can be viewed simultaneously in many different windows
The advantage of having your single data stream viewed in multiple WaveView windows is you can view them with different time scales, amplitudes and filter options simultaneously on the screen. You can close any and all WaveView windows at anytime.

The WaveView window data stream display is completely independent of the data recording process where raw data is stored continuously in hour long files.

MULTIPLE WAVE VIEW WINDOWS

The above example shows four WaveView windows opened with all using the same data stream simultainiously. The windows have been opened individually using any of the methods described above and moved about the screen. Each was sized and moved individually to fit the example shown. Each window is displaying data differently and independently of the other. The top shows a paused window of ~ 20 minutes duration. The second shows over 7 hours of data, the third, a 4 minute window and the right window shows a paused window, one minute in duration showing a distrubance that was recorded. All of these WaveView windows show the current data that is held in the display buffer.

    Seismic data is stored in hour long files in parallel to data that is placed in the display buffer. These "historical" data files can also be viewed and manipulated without fear of destroying the raw data by using SCREAM's REPLAY mode. How to view historical stored data files will be covered in a section called REPLAY FILES.

To manipluate data being viewed in a WaveView window, move the mouse pointer anywhere on the window desired and click on it. The top bar of the window changes from grey to blue indicating the window is chosen and is 'active'. For windows that are layered behind one another, moving the mouse pointer and clicking  anywhere on the window desired, brings it into the foreground and makes it the 'active' window. Clicking on the Top BLUE area of the WaveView window and "dragging the mouse" (moving the mouse with the left button pushed down) allows you to move the window around the screen.

To change the size of the WaveView window, move the mouse pointer and pause on any edge of the WaveView window, the mouse pointer will change to an 'opposing arrow' icon. "Click and drag" the 'opposing arrow' icon in or out, to move the window edge to the size desired. Do the same for for any edge of the window to achieve the desired size.

For EACH WaveView window open, the whole data stream buffer, as dictated by the size that was set in the "display" Setup option menu,(999 minutes in
   this case)  is available to view and manipulate.
For every WaveView window that is open, all are activly updating with new data as it comes in.
Every WaveView window displays the Date and Current Time on the top of the window.

How much of the data stream that is shown in the WaveView window depends on the time scale and amplitude settings for each window and how big the WaveView window is set, if it is full screen size, 'maximized', the entire buffer of 999 minutes can be up on the screen. If the WaveView window is standard size, it can display up to 7 hours of data in the window.

Bringing Sections of Data Streams into View in a WaveView Window    back to top

In the example shown, the light blue or top WaveView window and the large WaveView window on the right, show a "paused" display.
When a display is paused, by pressing the  button, a scroll bar appears on the bottom of the WaveView window.

This Scroll bar works much the same as used in other Windows utilities such as WORD where only parts of a document can be viewed on the screen at a time. Using the scroll bar allows the user to bring into view different sections of the document.
Each WaveView window scroll bar works much the same way and how much of a given data stream section can be viewed in the WaveView window is dictated by the time scale settings of  the specific WaveView window being used.

    Pausing the data stream and using the scroll bar, allows the user to bring into view, the specific time section of the data stream desired.
To pick a certian section of the data stream to view in the WaveView window, use the mouse pointer and click and hold, while dragging the square button to any position in the slider field. Releasing the button moves the WaveView window to the chosen section of the data stream.

The Square button allows user to scroll very fast up and down the entire data stream bringing sections into view. If 7 hours of stream data is buffered in, then moving the scroll button to the middle of the grey field puts into view, the section of time 3.5 hours into the data stream. Moving the Scroll button to the far left of the grey field, brings into view the first minutes of the data stream buffer.

Clicking the mouse pointer in the Grey field on either side of the slider button, increments the data stream buffer into view in TEN second "chunks" at a time.
Clicking on either Arrow on each end of the slide bar  increments the data stream into The WaveView window, ONE second at a time.
 
 

Blowing Up or "Zooming In" in a WaveView window:    back to top

Pausing a WaveView window allows an option to "Blow Up" a section of the wiggle trace.
This allows the user to immediately take a closer look at a section of time that contains a disturbance or event.

To blow up a section of time for a close up inspection, move the mouse pointer and click on the PAUSE button.
Use the time and amplitude buttons to adjust the amplitude and time scale, to do this quickly, use a very close time scale, tens of minute or 1/2 hours or more.
Use the slider button to move up or down the data stream to bring the disturbance onto view.
Move the mouse pointer to an area just prior to the disturbance AND above or below the wiggle trace.
Click and hold down the mouse button AND drag the mouse over the disturbance. Lines appear allowing you to "BOX" in the area.
Release the mouse.
The WaveView window will immediatly "blow up" the section that was "boxed" in to fill the window. Use the amplitude button as needed.
This "Zooming In" in to blow up time sections can be repeated multiple times to zero in on P and S arrivals. The time and amplitude curser measurements are a great feature to use when zooming in to help calculate arrival times.
To go back or Zoom Out , use the mouse pointer and click on the "pointing in arrows" multiple times as needed to get back to the scale you want.
Click on the PAUSE button to "unfreeze" the WaveView to allow into view new data as it comes in.

"Right Click" Options in the WaveView Window     back to top

Moving the mouse pointer anywhere in the field of the WaveView window and "RIGHT" click on the window produces a task window which allow you to make changes to the WaveView window. Thus you can change the WaveView colors to be different from the default colors you set in the SET UP options.
Scroll down to highlight the option desired and click on it.

Colour changes the color of the wiggle trace.
Backgound Colour allows you to change the background color of the WaveView window.
   A color pallette window appears and you can choose or customize a color of your choosing as described in the Display Set Up instructions.
Spectrogram gives a "Fast Fourier Transforn" (FFT) plot of the wiggle trace. This is best viewed with a white background window.
Delete and Clear Window clears the WaveView window but keeps it open. If you "drag" a new data stream into this window, the "right click" options are
    disabled.
    To restore the "right click" options, close the WaveView window by using the X button and open a new one.
Locked Offset disables the "null" button and locks the present seeting of the dc offset of the data that is being displayed.
Label lets you assign a unique name to the WaveView windows to help you identify the data stream or describe what you are doing in the WaveView window.

Details opens a window information about the data stream as it is being fed into the WaveView window. The Offset window can be changed by the user to add a DC offest to the wiggle trace, in a positve or negative direction.

The Offset Window
This option is useful if there are two data streams or more in ONE WaveView window and you wish to bring them closer together or even "overlay" one wiggle trace on top of another.
Use trial and error and type in a value and hit the return key to invoke it, see where it moves the wiggle trace and try again until you get the wiggle trace where you want it displayed in the WaveView window.

REPLAY FILES    back to top

Replay Files is a SCREAM program function that allows the user to view data that has cleared out of the display buffer and is stored in files on the hard drive.
Only data that is stored in .GCF format can be replayed using SCREAM's WaveView windows.
Raw data, once it has been stored to disk cannot be altered when viewed in SCREAM's WaveView windows.
Replay mode allows the user to utilize all of the WaveView functions to view historical data.
NOTE: Replay cannot combine files into new files, nor cut segments of data from a data file to make a new file.

To use File Replay to view stored historical data in a WaveView window Go to the Available Streams window and
move the mouse pointer to File and left click on this button .The following options appear. Move the mouse to scroll down the menu options and highlight and click on Replay Files.

A new window, opens asking you to select the files for replay.
Go to your data folder.
To get to your data folder:
Use the mouse pointer to click on the Down Arrow icon beside the Look in: window. Select your directory path by clicking on it.
Use the mouse to click and highlight to choose folders in the window and click on the open button or double click on them until you reach the location where your data is stored.
The data files should look similar to the image above.
Use the slider button to scroll through the data files until you find the date and time of various files you wish to replay.
Use the mouse pointer to highlight a file and click on it to choose the file and click on the Open button. You can highlight several folders in the range you want by highlighting either the first or last file wanted and clicking on it to choose it, then use shift key with the up or down arrow on the computer keyboard to highlight a section of several files to move into SCREAM  to replay. Once you have selected a file or group of files by highlighting them, click on the Open button.

The files you chose to view will show in the Available Streams window in the left and right panes.
The files folder will be highlighted and all files you chose for replay will be listed  with the data streams showing in the right pane pf the Available streams window.
The Replay Control window will appear on the screen:
.
 You can choose what file to view by clicking on the down arrow
and scrolling down to choose the file you want to view. If you files are not large and you have chosen just a few files, you can choose (All files) and all the files you chose for replay will be fed into the memory buffer as a group.

The left and right arrows control the speed the data is fed into the memory buffer.
The left arrows slow down the speed data blocks are fed in and right arrows speed up the block data rate up.
1x feeds one data block per 24 seconds and 128x feeds 4 data blocks per second into the WaveView window.

The pause button stops the data from being fed into the memory buffer and holds here until the paused button is pressed again.
The frame button works only when the replay pause button is used. While in pause mode, it will feed one data block into memory and into the WaveView window each time the button is pushed.

REPLAY EXAMPLE:               back to top
    The file chosen for replay in the following example is a VERY large file, 15 hours of data in one file. This is a mistake I made when fiddling with the set-up parameters. For ease finding events of a specific time and having data files that "fit" in a WaveView window, I recommend the data files be set to 1 hour in length or no more than 4 hours in length. The data file I chose for replay has the starting date and time of March 16, 2000 00:00 hours.

To watch data be repoduced in a WaveView window:
Double click on the data stream in the right window pane of the WaveView window that matches the file you want to view. This will open a WaveView window with the data stream you want to see. Only the first block of data will show on the screen.
Choose the corresponding data stream to replay using the Down Arrow and picking the file in the Replay Control window. If you have only one file chosen or wish to view all the files into the WaveView window buffer, choose (All files).

The WaveView window will not be paused and you will observe time marching across the screen with no data stream coming in.
Go to the Replay Control window and observe the Pause button is pressed in.
Click on the Frame button and observe a block of data feeds into the WaveView window each time you press the button. If it does not, you have chosen the wrong file in the Replay Control window.
Look at the Available Streams window and observe the End Time change as you click on the frame button. This is the File the WaveView window is opened to see.
Go back to the Replay Control window and choose the correct file or double click on the Data Stream in the Available Streams window to open a new WaveView window with this data file in it.

If (All FIles) have been chosen all the End Times for each data file will increment but only the one chosen to be opened in a WaveView window will show.

In the Replay Control window, click on the speed up or slow down arrows to choose a rate to feed data into the WaveView buffer 64x is a good starting rate.
With the correct WaveView window in the foreground, click on the Pause (un-pause it) button in the Replay control Window and observe data starts feeding in to view.
You can adjust the time and amplitude controls of the WaveView window as you prefer and the size of the window as well.
Click on the speed controls to go faster or slower or pause the window to stop for a time, to take a closer look at a section.

PAUSING           back to top

Note: if you paused the Replay Control, you must pause the WaveVeiw window or time will continue to march across the screen with nothing coming in.

Once the WaveView Window is paused you can use the scroll button to move up and down the data stream to get a particular section into view and use all of the WaveView buttons to manipulate the data.

In the example above I ran the ran the Replay Control until I observed this event coming in. I paused both the Replay and the WaveView window to take a better look at this event, an earthquake located off the coast of Northen California, mag. 5.5 is shown above as it was recorded in Bloomington, Indiana. I noted the data and time. Later I ran the GCFinfo program to "cut" this event out of this huge data file and made two new data files containing only this event to use again in Replay Control as an event file stored in .gcf data format and to Upload the event to the Princeton database stored as an event file in .pepp format.

UNPAUSING      back to top

    To view the rest of the data "unclick" the WaveView window pause button  FIRST  and then "unclick" the Replay Control pause button SECOND. Continue to use the speed control and WaveView window controls as needed.

Often the null offset button needs to be pushed in the WaveView window to keep the data stream in the range of the window when temperature variations have affected the sensor.

VEIWING LOADED FILES AFTER REPLAY CONTROL       
back to top

When all files have been run through the Replay Control window, whether all at once or one at a time, the Replay Control window closes and is no longer needed.
The data streams are now fed into their respective WaveView Window buffer and are available to view in a WaveView window at anytime.
Simply "Double Click" on a FILE data stream to view it.
Note:
Use the Pause button in the WaveView window or time will continue to march across the window as if  realtime data is being displayed.
The window must be paused to be able to scroll up and down the data stream.

Another feature is more than one data stream can be viewed in a single WaveView window, IF the data streams are small AND are in consective time frames or within the time window of the WaveView display, simply "Drag and Drop" a data stream into an open WaveView window that already has one in it.
The streams will be "offset" as they are treated as different data sources. If you want to "combine" data into one stream to view, use the program GCFinfo to combine the files into a single "new" file and replay the new file.

REMOVING REPLAYED FILES      back to top

To REMOVE data files from the Available Streams window, highlight the data stream or the file name in the left pane and right click on it. Scroll down to Delete to remove the file.
Note: this DOES NOT delete the data file stored on the hard drive. It deletes the data stream that was copied into the WaveView buffer.
 See SCREAM'S Help Menu for additional information regarding File Replay.
 
 

Other Ways to View Stored DATA      back to top

GCFInfo

GCFInfo is another GURALP program that allows a very quick view of many data files together.
GcfiInfo, without altering the original data file, allows new data files to be made from combining multiple data files and/or "cutting" time sections of data into new data files that contain Notable Events.
New data files created with GCFInfo can be converted into other data formats other than .GCF format such as PEPP format to upload data to the PEPP Princeton Database.
GcfInfo's viewing screen is more limited than the WaveView Window, but it is a very good program to quickly scan through large data sets to look for events and to"cut" time sections into new files that contain only the duration of the Notable Event.

See the instructions, Using GCFInfo on how to use this program.

DrumPlot

Drumplot is a more "crude" program that is still under development that is a nice 'Add On' feature to the SCREAM program.
This program requires a network card to display real-time data as it simply listens to the network port that the SCREAM program is sending or recieveing stream data.
DrumPlot can "import" or read a block of (24 consectutive one hour files) historical stored data files and display them in it's graphic plot.
DrumPlot is a display and printing utility which presents the data as a page per 24 hours.
The data is drawn in graph form in 24 rows of one hour each.

See the instructions on DrumPlot on how to use this program.

Getting Real Time Data From the Internet Using SCREAM      back to top

The WINDOWS pull down menu in the Available Streams window has an option that allows you to "Pull Data" from other SCREAM systems that are connected to the internet. The following proceedure will describe how you can get other PEPP data streams from systems that have a direct internet connection such as Indiana University's Data Stream. To get other data streams, the IP (internet protocol) address  of each PEPP computer must be known and the PORT NUMBER as set in SCREAM's SETUP Network Option MUST must be set to the same PORT NUMBER and "Recieve Data From Serial Port" MUST BE CHECKED!

"Pulled" data will show up in the Available Streams window and can be used and stored just like data coming in on the serial port. The data recieved is yours to use as you wish.

To pull Indiana U’s data stream : Make Certain the Network options in SCREAM's Setup menu are properly set: See the instructions on Network tab. Go to the Windows pulldown window in the Available Stream's window.

Click on Network Diagnostics in the Windows pull down menu of the Available Streams window;

A new window will open:

Click on Server and choose Add   and a dailog box opens:


type in the dialog box:
129.79.146.66 (this is the IP address of a PEPP system at IU)

The IP address you typed will show in the Network Diagnostics window under Server as shown below.

Move the mouse pointer and click on the server you added to highlight it. While the mouse pointer is inside the highlighted section, RIGHT click to open the GCFcommand window:

It is VERY helpful to make a note in the Comment field that tells you the source of this data stream you are requesting. Only PEPP ID name of the data stream shows in the Available Streams window with no indication of the IP address it is coming from. Use the mouse and scroll down to highlight "Comment" to choose this option and type an identification name to this IP address to know it's source. Click on "ok" when done.
Right click on the Server IP address to open the GCF command option window again and scroll down to
Choose GCFPING:
Click "OK" on the ping window that comes up.

Look in the right window pane of the network diagnostics window and see if there is a statement that says:
GCFACKN  as shown in the example below.

The Network Diagnostics Window       
back to topThere are 4 panes to this Network Diagnostics window:
The top is the Server list where all IP addresses for data streams that are being "pulled" into SCREAM are listed.
The Transmit UDP window pane (left), lists all data packets that are being TRANSMITTED out to specific addresses listed or in broadcast mode,(as in this case)from the PEPP computer.
The Recieve UDP window pane (middle), lists all data packets that are being RECIEVED from the server IP addresses listed in the Server window pane.
The Network connection window pane (right), lists the network activity the SCREAM program is performing to send and recieve data packets.

If you get this acknowledgment, CMD: GCFACKN from 129.79.146.66, you can get our data stream.
If there is no response to the GCFPING request, you cannot get our data because of the local internet configuration.
RIGHT click to open the GCF command option window and choose GCFSTOP to stop ping requests from being sent out to this server after trying and getting NO Acknowledgements.

Often a network security "firewall" prevents the SCREAM program from sendng and recieving data packets form the network. If you DO NOT get a GCFACKN, a "firewall" exists between your PEPP computer and the PEPP computer you are requesting data from.
Check with your network administrator about allowing a port through the firewall to be opened to the PEPP computer or ask for a direct connection "outside" the firewall for the PEPP computer.
Another option to achieve getting data packets over the internet is to use a modem and run through a phone line.
Consult the PEPP help manual for more information about SCREAM's network protocol and descriptions.
Send an email to requesting help to:PEPP@indiana.edu

If you get an acknowledgment in the right pane, CMD: GCFACKN from 129.79.146.66

Open the GCF command optiion window by RIGHT clicking on the IP address of the server you want data from and

Click on GCFSEND:L

Our data packets will start showing up in the Recieve UDP (middle pane) of the diagnostics window
Look in the Available Streams window, our data stream should appear after a moment or two.

The above process can be repeated for as many servers as desired.
The data the SCREAM program recieves over the internet can be treated the same as data coming in from the serial port. It is yours to treat as your own data.

To remove a server on the Network Diagnostics list:    back to top

Highlight the server you want to remove and RIGHT click to open the GCF command option window and choose GCFSTOP.
Then, Hightlight the server you want removed from the list and move the mouse pointer to the Server pulldown window and scroll to choose and highlight
    Delete This removes the sever from the Network Diagnostics window.

This summurizes MOST of the many features and options available in the SCREAM program. Visit this site often for program updates as it comes available.

TO BE ABLE TO RESPOND TO DRM REQUESTS FROM PRINCETON YOU MUST RUN A COMPANION PROGRAM CALLED GCFINFO.
    GCFinfo is program that allows you to quickly view stored data files and combine hour files together and "cut" a section if time that contains an earthquake and make this into a seperate data file and convert it into the PEPP data format such that you can upload to the Princeton database. Install the program from the PEPP Cd or download it from: http://www.guralp.demon.co.uk/software/winutils.htm. Follow the HTML on the CD or go to the Indiana University PEPP web site to learn how to use GCFinfo.

Have fun with SCREAM!        back to top
Terry Stigall
03/27/00