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 = 2008-10-01 NOTE = "Notes and errata for the Odyssey GRS EDR archive" END_OBJECT = TEXT END October 1, 2008. Release 25. ---------------------------- No errors or changes are reported for this release. July 1, 2008. Release 24. ------------------------- There are no EDR gamma spectra for October 1-9 due to a GRS safe mode. April 4, 2008. Release 23. -------------------------- There are no EDR, DHD, or DND products for September 15-20 due to a GRS anneal and safe mode. There are no EDR gamma, profile, or pulser data on September 30 due to an anneal. DND data for September 27-30 are not archived due to instrument pointing issues. January 8, 2008. Release 22 update. ----------------------------------- EDR products with an incorrect value of zero for the orbit number, as reported on 1/1/08, have been corrected. January 1, 2008. Release 22. ---------------------------- The following data products contain records with an incorrect value of zero for the orbit number between the times 2007-05-12T18:16:05 and 2007-05-14T21:59:34: GRS EDRs, HEND EDRs, NS EDRs, DND products, and CGS products. These products will be corrected. October 9, 2007. Release 21. ---------------------------- No gamma spectra were acquired between January 5 and January 16, 2007, because the GRS detector was being annealed. July 1, 2007. Release 20. ------------------------- Data gaps in EDR coverage occur for these dates: Oct. 22-24, 2006, Nov. 15, and Dec. 8-14, 2006. The last record in the gamma ray EDR file for 10-07-2006 has a time that is not in sequence with the previous record. Penultimate Record: 2006-10-07T23:59:42.343Z Ultimate Record: 2006-10-07T05:25:44.928Z April 24, 2007. Release 19. --------------------------- No errors or changes are reported for this release. January 1, 2007. Release 18. ---------------------------- No gamma spectra were acquired between April 5 through April 11, 2006, because the GRS detector was being annealed. No neutron spectra were acquired between June 19 through June 22, 2006, because the galactic cosmic-ray flux was too high. October 1, 2006. Release 17. ---------------------------- The EDR products for January 5, 2006, have a data gap of approximately 7 hours due to a ground station outage. The file references.txt in the document directory and the file dataset.cat in the catalog directory have been updated. July 1, 2006. Release 16. ------------------------- The files bad_data_timeline.txt and references.txt in the document directory have been updated. April 3, 2006. Release 15. -------------------------- No errors or changes are reported for 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. The file dataset.cat in the catalog directory has been updated with additions to the list of data gaps. The files bad_data_timeline.txt, references.txt, and time_conversion_tables.pdf in the document directory have been updated. October 1, 2005. Release 13. ---------------------------- The file dataset.cat in the catalog directory has been updated with additions to the list of data gaps. The file references.txt in the document directory has been updated. A new file, bad_data_timeline.txt, has been added to the document directory. It lists time ranges of data products for which BAD_CODE flags have been manually set. July 1, 2005. Release 12. ------------------------- The file dataset.cat in the catalog directory has been updated with additions to the list of data gaps, time periods during which data are suspect due to solar particle events or other reasons. 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. -------------------------- No errors are reported for this release. January 1, 2005. Release 10. ---------------------------- 1. These files in the catalog directory have been revised. dataset.cat 2. These files in the document directory have been revised. grs_gamma_processing.pdf grs_gamma_processing.lbl references.txt October 7, 2004. Release 9. --------------------------- No errors are reported for this release. July 1, 2004. Release 8. ------------------------ 1. Records from several gamma spectra, neutron spectra, and HEND spectra files have anomalous orbit number values. Specifically, the orbit number increases by more than one orbit, or does not increase at all, or decreases. These files will be corrected in a later release. Here are the affected files and spacecraft event times where anomalies begin. gamma_spectra_20031111.dat, 2003-11-11T23:59:37.248 gamma_spectra_20031114.dat, 2003-11-14T07:23:41.640 gamma_spectra_20031220.dat, 2003-12-20T16:28:00.120 gamma_spectra_20031220.dat, 2003-12-20T16:28:19.865 gamma_spectra_20031223.dat, 2003-12-23T23:59:29.175 gamma_spectra_20031230.dat, 2003-21-30T23:59:42.342 hend_spectra_20031111.dat, 2003-11-11T23:59:37.202 hend_spectra_20031118.dat, 2003-11-18T23:59:43.023 hend_spectra_20031220.dat, 2003-12-20T16:28:00.120 hend_spectra_20031220.dat, 2003-12-20T16:28:19.865 hend_spectra_20031223.dat, 2003-12-23T23:59:29.175 hend_spectra_20031230.dat, 2003-12-30T23:59:42.342 neutron_spectra_20031111.dat, 2003-11-11T23:59:37.924 neutron_spectra_20031118.dat, 2003-11-18T23:59:22.933 neutron_spectra_20031220.dat, 2003-12-20T16:28:00.765* neutron_spectra_20031220.dat, 2003-12-20T16:28:20.509* neutron_spectra_20031223.dat, 2003-12-23T23:59:28.878 neutron_spectra_20031230.dat, 2003-12-30T23:59:21.936 *In these records the latitude value also changes unexpectedly. 2. Records from one gamma spectra, one neutron spectra, and one HEND spectra file have anomalous values for solar longitude (Ls). These files will be corrected in a later release. Here are the affected files and spacecraft event times where anomalies occur. gamma_spectra_20031220.dat, 2003-12-20T16:28:19.865 hend_spectra_20031220.dat, 2003-12-20T16:28:19.865 neutron_spectra_20031220.dat, 2003-12-20T16:28:20.509 3. These files in the catalog directory have been revised. dataset.cat ref.cat 4. These files in the document directory have been revised. grs_gamma_processing.pdf grs_gamma_processing.lbl references.txt April 1, 2004. Release 7. ------------------------- 1. All previously released EDR products have been revised using improved processing algorithms. The field BAD_CODE, which appears in most EDR products, is now a 32-bit field rather than 16-bit as before. New definitions for this field are in the revised file document/bad_code.txt. 2. All files in the label directory have been revised. 3. All files in the extras directory have been revised. 4. These files in the catalog directory have been revised. dataset.cat ref.cat 5. These files in the document directory have been revised. bad_code.txt edrsis.pdf edrsisappx.pdf grs_gamma_processing.pdf references.txt time_conversion_tables.pdf January 7, 2004. Release 6. --------------------------- 1. These files in the catalog directory have been revised. dataset.cat ref.cat 2. These files in the document directory have been revised. grs_gamma_processing.pdf grs_gamma_processing.lbl references.txt October 1, 2003. Release 5. --------------------------- 1. These files in the software directory have been revised and renamed. edr_code.zip is now grs_code.zip edr_code.lbl is now grs_code.lbl edr_code_doc.zip is now grs_code_doc.zip edr_code_doc.lbl is now grs_code_doc.lbl 2. These files in the document directory have been revised. grs_gamma_processing.pdf bad_code.txt 3. This file in the document directory is new. time_conversion_tables.pdf 4. All files in the extras directory have been revised. 5. This file in the catalog directory has been revised. dataset.cat July 1, 2003. Release 4. ------------------------ 1. Additional documentation has been added with this release: calib/ns_calibration_summary.pdf document/grs_gamma_compression.pdf document/grs_gamma_processing.pdf document/neutron_compression.pdf Also, these documentation files have been revised: catalog/dataset.cat catalog/ref.cat document/references.txt May 13, 2003. Update to Releases 1, 2, and 3. --------------------------------------------- 1. All previously released Neutron Spectrometer EDR products have been revised. A new data column has been added: CAT2_CNT, the number of category 2 events. Revised Neutron Spectrometer products can be identified by the label keywords PRODUCT_VERSION_ID = "2.0" and PRODUCT_CREATION_TIME between 2003-04-25 and 2003-04-29. April 1, 2003. Release 3. ------------------------- There are no notes for this delivery. January 1, 2003. Release 2. --------------------------- 1. All EDR products acquired between April 25, 2001 and March 31, 2002 have been revised. Labels for the revised products have a PRODUCT_VERSION_ID of 2.0. November 1, 2002. Update to Release 1. -------------------------------------- 1. Neutron Spectrometer EDR data have been added to the archive. October 1, 2002. Release 1. --------------------------- 1. Neutron Spectrometer EDRs will be delivered approximately November 1, 2002, due to a delay in validating the data. 2. Cruise and aerobraking data have zeroes in fields for several geometry-related parameters, such as orbit number, latitude, longitude, spacecraft position and velocity vectors. This is because either the parameter does not apply for these mission phases, or pointing information was not available. 3. The sub_scpos_mars column in the HEND spectra and gamma spectra data files has values of zero. This field is currently not used and is not being computed. Instead, use latitude and longitude values for the sub spacecraft position. 4. The calibration report is preliminary and will be revised.