Tsunami Version B2010

Release Notes

11/9/10

The B2010 release of Tsunami Suite includes an update to the Pre-Stack Time Migration (PSTM) application and the latest INTViewer to our customers using this product.

This release does not contain any general updates.

Output at floating datum

Our users requested support to output traces with a floating datum. Previously when migrating from floating datum, PSTM would output the first sample of data migrated with floating datum at the fixed datum. Now the user can select to have the first sample output at the floating datum. By default the program will output at the fixed datum, so users wishing to use this feature must change their parameters. The picture below shows the addition to the user interface that allows the user to select for output at the floating datum.

Node error handling

Based on customer request the PSTM application will now provide information on the responding nodes when a job aborts or completes.  When a job starts, a folder will be added to the project directory called nodes_<parameter file name>. When the job ends, either because it completed or aborted, nodes that are still responding will be removed from the directory. Any node names still appearing in the directory refer to nodes that did not respond as the application exited. The picture below shows an example of a project directory structure where a node has not responded when the job completed. Please note that this feature is not stable on SGI.

Variable Velocity

The method for calculating and handling variable velocity has been made more flexible. Users now enter a table to define the velocity variation. This allows the use of uneven steps. Previous versions only allowed the use of a single time/velocity (or time/eta) function. The new version supports inputting an SEGY velocity (or eta) model. These changes have resulted in changes to the parameter definitions. Details of these changes are contained the PSTM Technical Reference Manual located under Help in the GUI or on our support portal (http://tsunami.zendesk.com).

The following are bug fixes and/or changes to the current methods within the PSTM module.

1.       Some users were reporting that licenses were not properly released, particularly if a job crashed or aborted. The timing of application operations was adjusted to improve the license release even when a job crashes.

2.       Offset vector tile binning was not calculating all offsets correctly. When the offset increment between bins was one, output traces were sometimes put into the wrong bin. This has been corrected.

3.       The PSTM application now supports use of a filename instead of a list when the list would only contain one file. Previously a user would supply a list of the input files in a separate text file and the parameters would refer to this text file. For example:

The user may now supply the name of the input file directly when there is only one input file to use. Please note that a best practice is to supply to the full path to the input file. This feature will not work when using DSOUT format. Below is a sample of how the user would set the input file to one specific file.

This change affects all parameters that use list files including input data files for PSTM and PSDM, travel time files for PSDM, and pick files for TOMO.

4.       In version 5.7 of PSTM, sometimes the moveout on the far offsets was not correct. This issue has been corrected. The image below shows an impulse response in version 5.6 and 5.7 (right).

Impulse response using inverse aperture pairs does not produce accurate results due to changes required for other requested features.

Tsunami B2010 contains a new release of the GUI. The version of the GUI can be seen in the About dialog. This version is B2010.100710.

When an application, such as PSTM, fails to begin execution because the master node in the node.db file pointed to the wrong operating system, the GUI pops up an error dialog saying the log file could not be opened.  While this is true (the log file could not be opened because it does not exist because the application failed before it could create the log file) it does not help the user to properly diagnose the error. A check was added for the exit status of the native process.  If not successful, the pop-up message will now tell the user to check the node.db.

The GUI was updated to support output at the floating datum in PSTM as described above.

The following are bug fixes and/or changes to the GUI.

1.       Users can now open the help files within the GUI. The files are also located in Tsunami_B2010/docs. In Tsunami A2010 this feature was not working but has been repaired.

2.       The Variable Velocity tab was updated to reflect changes to the PSTM application noted previously.

3.       The GUI was changed to ignore blank lines in the node.db.

4.       The Model Source table and the Percent Change table did not clear their data when changing between parameter files. If a parameter file is opened with data in the table and then closed, the tables still contained the previous data when another parameter file was opened. This was resolved.

5.       If the user has the intviewer_file_path property set incorrectly, the INTViewer will fail to start.  This property must be set to the location of the INTViewer.sh file.  When this happens, the error message is:
"The program failed to run: cannot run program "/home/tsunami/INTViewer": java.io.IOException: error = 13, Permission denied."

This means that "/home/tsunami/INTViewer" was attempted to be executed, but this is the installation directory for INTViewer, and not the executable .sh file. The error message was improved to say "The INTViewer failed to run." "Please check that the intviewer_file_path property points to the full path of your INTViewer.sh file." Refer to support.tsunamidevelopment.com for more information if needed.

6.       Removed the rsh and ssh commands from the application executions.  This would rsh or ssh to the master node to start the GUI. The  GUI must now be launched from the master.

7.       For all applications, the drop-down “View Files” was changed to “View Logs”.

8.       The GUI now supports a single input instead of a list when only one input file is required as further explained in the PSTM section.

The AutoPicker calculates semblance values as "Infinity" for curves where the amplitudes are all exactly equal (as in synthetic data or data where the amplitudes have been forced to a set value).  For now, when this occurs, the curve will be skipped.

The latest release of the INTViewer is included with the Tsunami B2010 release. If you are current licensed user of the viewer, you may enjoy all the new features that it allows. The most significant being the ability to add plug-ins to the viewer to expand its capabilities.

The 4.1 viewer contains many cosmetics changes from version 3.3 and users may find it useful to review the notes on this application before using it. Users can locate information on using INTViewer 4.1 in our support portal (http://support.tsunamidevelopment.com) and searching for ‘int’.