urn:nasa:pds:odyssey_grs_dhd:data_science_derived:dhd_20240708 1.0 1.19.0.0 Product_Observational 2025-03-14 1.0 Release 91 2024-07-08T00:00:16.640Z 2024-07-08T23:59:54.396Z MARS Odyssey Mission urn:nasa:pds:context:investigation:mission.2001_mars_odyssey data_to_investigation 2001 MARS ODYSSEY Host urn:nasa:pds:context:instrument_host:spacecraft.ody is_instrument_host HIGH ENERGY NEUTRON DETECTOR Instrument urn:nasa:pds:context:instrument:ody.hend is_instrument Mars Planet urn:nasa:pds:context:target:planet.mars data_to_target 91 DERIVED_HEND_DATA 1.0 EXTENDED MISSION 359645435486 359667548090 dhd_20240708.dat derived_hend_data_data_table 2025-03-14T21:43:11.648 0 3625 Derived HEND data are composed of raw counts, a background component, background subtracted counts and the associated timing and spatial information. The five raw counts fields included in the DHDs consist of the cumulative counts of neutrons at the detector of interest over one collection interval. The collection interval is approximately 19.7 seconds, but may vary over the course of mapping. The five background count fields are derived from spatial data and count data collected during the cruise phase of the mission. The five background subtracted count fields are the background subtracted counts at the detector of interest over one collection interval. Timing and spatial data provided with the counts include spacecraft clock values and spacecraft geometry data. The sc_ev_time, utc time and spatial fields are all recorded at the center of the collection interval. 22 0 108 SC_RECV_TIME 1 1 UnsignedMSB8 8 The time this packet was received by the spacecraft, in ticks (256 per second). UTC 2 9 ASCII_String 23 UTC time at the middle of pixel, stored as yyyy-mm-ddThh:mm:ss.sss. SUN_ACTIVITY 3 32 UnsignedByte 1 1=active sun during pixel interval; 0=no active sun during pixel interval AREOCENTRIC_LATITUDE 4 33 IEEE754MSBSingle 4 degrees Latitude in Mars fixed coordinates at the middle of the pixel. -999 AREOCENTRIC_EAST_LONGITUDE 5 37 IEEE754MSBSingle 4 degrees Longitude in Mars fixed coordinates at the middle of the pixel. -999 LS 6 41 IEEE754MSBSingle 4 Solar longitude (L-sub-s) at the middle of pixel. PIXEL_DURATION 7 45 IEEE754MSBSingle 4 s Duration of pixel in seconds. SD_BACKGROUND 8 49 IEEE754MSBSingle 4 Background counts for the Small Detector. MD_BACKGROUND 9 53 IEEE754MSBSingle 4 Background counts for the Medium Detector. LD_BACKGROUND 10 57 IEEE754MSBSingle 4 Background counts for the Large Detector. SC_LOW_BACKGROUND 11 61 IEEE754MSBSingle 4 Background counts for the low channels of the Inner Scintillator. SC_HIGH_BACKGROUND 12 65 IEEE754MSBSingle 4 Background counts for the high channels of the Inner Scintillator. SD_RAW_COUNTS 13 69 IEEE754MSBSingle 4 Counts gathered in the Small Detector during the pixel interval. MD_RAW_COUNTS 14 73 IEEE754MSBSingle 4 Counts gathered in the Medium Detector during the pixel interval. LD_RAW_COUNTS 15 77 IEEE754MSBSingle 4 Counts gathered in the Large Detector during the pixel interval. SC_LOW_RAW_COUNTS 16 81 IEEE754MSBSingle 4 Counts gathered in the low channels of the Inner Scintillator during the pixel interval. SC_HIGH_RAW_COUNTS 17 85 IEEE754MSBSingle 4 Counts gathered in the high channels of the Inner Scintillator during the pixel interval. SD_ADJUSTED_COUNTS 18 89 IEEE754MSBSingle 4 Counts gathered in the Small Detector during the pixel interval with background subtracted. MD_ADJUSTED_COUNTS 19 93 IEEE754MSBSingle 4 Counts gathered in the Medium Detector during the pixel interval with background subtracted. LD_ADJUSTED_COUNTS 20 97 IEEE754MSBSingle 4 Counts gathered in the Large Detector during the pixel interval with background subtracted. SC_LOW_ADJUSTED_COUNTS 21 101 IEEE754MSBSingle 4 Counts gathered in the low channels of the Inner Scintillator during the pixel interval with background subtracted. SC_HIGH_ADJUSTED_COUNTS 22 105 IEEE754MSBSingle 4 Counts gathered in the high channels of the Inner Scintillator during the pixel interval with background subtracted. dhd_20240708.lbl 0 PDS3 PDS3 label Carriage-Return Line-Feed