PDS Geosciences Node Data and Services: Odyssey GRS CGS

The gamma sensor part of the GRS instrument suite stopped returning data on September 7, 2009. There are no gamma EDR, CGS, or SGS data since that event. See the ERRATA.TXT file for details.

Oct. 1, 2026. The SGS dataset has been converted to PDS4.

GRS Corrected Gamma Spectra (CGS) products are organized as a single virtual volume. Each CGS file includes data for a two-hour time span. The products are aggregated in subdirectories by day. The subdirectories are in turn grouped into directories by year.

Use the links below for direct HTTP access to any part of the GRS CGS archive. Alternatively, to search the archive for data that meet particular criteria, e.g. time and location, use the Mars Orbital Data Explorer (ODE).

AAREADME.TXT	Introduction to the archive
ERRATA.TXT	Notes and errata for each release
2009 directory	Data products acquired January 1, 2009, through September 7, 2009
2008 directory	Data products acquired January 1, 2008, through December 31, 2008
2007 directory	Data products acquired January 1, 2007, through December 31, 2007
2006 directory	Data products acquired January 1, 2006, through December 31, 2006
2005 directory	Data products acquired January 1, 2005, through December 31, 2005
2004 directory	Data products acquired January 1, 2004, through December 31, 2004
2003 directory	Data products acquired January 1, 2003, through December 31, 2003
2002 directory	Data products acquired February 19, 2002, through December 31, 2002
INDEX directory	Index of all PDS3 products in the archive
DOCUMENT directory	Documentation for the archive
CATALOG directory	Information about the archive in the PDS3 Catalog
LABEL directory	Format files referenced by the PDS3 labels. These format files describe the column layout of the data files.
SOFTWARE directory	Java source code library for parsing GRS data files
Root directory	Top-level directory of the virtual volume

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