This topic shows how to check SEG-D field records in g-Viewer and convert them to SEG-Y, save them again as SEG-D or write a time-stamp file.

g-Viewer reads SEG-D revisions 0, 1, 2, 2.1 and 3.

A SEG-D record set open in g-Viewer: the Seg-D tab, the Seg-D files and File info panels, the QC views, the current record and the Location Map:

Step-by-step

1. Add the data: Add Seg-D files or Add directory on the Seg-D tab or in the Seg-D files panel, or drop *.segd files onto g-Viewer. For continuous shooting, add the directory and switch on Sync folder.
2. Click the record set in the Seg-D files panel. g-Viewer switches to the Seg-D mode.
3. Check the Settings: Seg-D version (set automatically from the file), Apply MP factor, Convert WGS84 to UTM and Additional headers.
4. Read headers (current record set) or Read headers all.
5. Check the records in the QC views. Exclude bad records in the Suspicious file list.
6. Convert or save the record set (see below).

Convert to Seg-Y

Convert to Seg-Y writes the current record set into one SEG-Y file. Choose the file name in the Save Seg-Y dialog. Excluded records are skipped.

Save Seg-D

• Writes format 8058, one record per FFID. A revision 3 record set stays revision 3; all others are written as revision 2.
• Option Save only live traces in the save dialog.
• Excluded records are skipped.
• When records have different numbers of samples, the extra output files are named <name>_<samples>.segd.
• When done, g-Viewer reports Saved N Seg-D records to ....

Time-stamp file

Writes FFID, year, day, hour, minute and second of every record to a CSV file. Read the headers first.

Seg-Y to Seg-D

Save Seg-D in the Seg-D plug-in group of the Tools tab saves the selected SEG-Y file as SEG-D revision 2 (format 8058), one record per FFID.

File names

If you type a file name without an extension, g-Viewer adds it (.sgy, .segd or .csv). If that file already exists, g-Viewer asks whether to replace it.

See Also

• Seg-D bar
• Seg-D files
• Seg-D QC views
• Formats