PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM INSTRUMENT_HOST_NAME = "2001 MARS ODYSSEY" INSTRUMENT_NAME = "GAMMA RAY SPECTROMETER" TARGET_NAME = MARS OBJECT = TEXT PUBLICATION_DATE = 2009-10-01 NOTE = "Notes and errata for the Odyssey GRS AHD archive" END_OBJECT = TEXT END October 1, 2009. Release 29. ---------------------------- This release covers data acquired between January 1 and March 31, 2009. Instrument activities and related data gaps for all GRS products are given by the following notes from the GRS Science Team. GRS Door Close/Ramp Down 1/6/2009 - 1/7/2009 GRS Anneal 1/15/2009 - 1/30/2009 No CGS 1/8/2009 - 1/28/2009 S/C Cold Reset Activities Gamma HV Ramp down ci3237 3/9/2009 LANL HV down ci3273 3/9/2009 LANL Off ci3269 3/9/2009 HEND Off ci3290 3/9/2009 GRS Safe Mode Recovery 3/13/2009 No DHD 3/10, 3/11, 3/12 No DND 3/19 through 3/31 No CGS 1/8 to 1/27 and 3/10 to 3/13 No SGS anneal, cold boot, hv not on until April. July 23, 2009. Release 28. ------------------------- This release nominally covers the dates October 1 to December 31, 2008, but the GRS instrument suite was turned off between June 2008 and November 6, 2008. No GRS AHD data were included in the previous release (Release 27, April 1, 2009), and data for this release begin in November 2008. January 1, 2009. Release 26. ---------------------------- No data are available for June 5, 2008, due to a GRS safe mode event. No neutron spectrometer data are available for June 8-30, 2008, and no gamma ray spectrometer or HEND data are available for June 9-30, 2008, due to a GRS instrument reset event. October 1, 2008. Release 25. ---------------------------- No errors or changes are reported with this release. July 1, 2008. Release 24. ------------------------- No errors or changes are reported with this release. April 4, 2008. Release 23. -------------------------- No errors or changes are reported with this release. January 2, 2008. Release 22. ---------------------------- No errors or changes are reported with this release. October 1, 2007. Release 21. ---------------------------- No errors or changes are reported with this release. July 1, 2007. Release 20. ------------------------- No errors or changes are reported with this release. April 24, 2007. Release 19. --------------------------- No errors or changes are reported with this release. January 1, 2007. Release 18. ---------------------------- No errors or changes are reported with this release. October 4, 2006. Release 17. ---------------------------- The file dataset.cat in the catalog directory has been revised. The file references.txt in the document directory has been revised. July 1, 2006. Release 16. ------------------------- This release includes new Averaged HEND Data acquired between October 1, 2005, and December 31, 2005, along with revisions of all previously-released AHD products acquired between March 1, 2002, and September 30, 2005. The DHD data from which these AHD data are derived were reprocessed to make corrections for background influenced by changes of Cosmic Gamma Ray flux as a function of solar cycle. The changes are described in the file grs_hend_processing.pdf in the document directory. The file dataset.cat in the catalog directory has been revised. The files grs_hend_processing.pdf, bad_data_timeline.txt, and references.txt in the document directory have been revised. April 3, 2006. Release 15. -------------------------- No errors or changes are reported with this release. January 1, 2006. Release 14. ---------------------------- Between April 3 and April 6, 2005, the Odyssey spacecraft was in safe mode, so GRS data is missing for those dates. Solar events on May 16-17 and June 17-18, 2005, were also responsible for some data gaps. See the file bad_data_timeline.txt in the document directory for details of data gaps. The files bad_data_timeline.txt and references.txt have been added to the document directory, and the file time_conversion_tables.pdf has been updated. October 1, 2005. Release 13. ---------------------------- There are no errors to report for this release. July 1, 2005. Release 12. ------------------------- There are no errors to report for this release. April 25, 2005. --------------- The file mission.cat in the catalog directory has been updated to include a discussion of Odyssey Extended Mission 1. April 1, 2005. Release 11. -------------------------- There are no errors to report for this release. January 1, 2005. Release 10. ---------------------------- The following files in the document directory have been revised: grs_hend_processing.pdf grs_hend_processing.lbl time_conversion_tables.pdf time_conversion_tables.lbl October 1, 2004. Release 9. --------------------------- There are no errors to report for this release. July 1, 2004. Release 8. ------------------------ 1. This is the first release of Odyssey Averaged HEND Data (AHD) products.