urn:nasa:pds:odyssey_grs_ahd:data_science_averaged:ahd_13_030_045 1.0 1.19.0.0 Product_Observational 2025-09-19 1.0 Release 93 2025-01-15T00:00:00.000Z 2025-02-17T00:00:00.000Z 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 93 AVERAGED_HEND_DATA 1.0 EXTENDED MISSION 030 045 363870055234 364622074514 ahd_13_030_045.dat averaged_hend_data_data_table 2025-09-19T20:17:51.229 0 2592 The AND product data has been averaged spatially over a 5 degree by 5 degree grid and temporally over intervals of 15 degrees of solar longitude. The AHD product data is presented in a table corresponding to the 5 degree by 5 degree grid. There are 36 latitude bands and 72 longitude bands, thus 2592 grid cells. Each cell corresponds to one row in the table. The first 72 rows in the table are the data for the 5 degree latitude band centered at 87.5 degrees north latitude, the second 72 rows are the data for the band centered at 82.5 degrees north latitude, and so on. Within each band, longitude increases eastward from the cell centered at 2.5 degrees east longitude to the cell centered at 357.5 degrees east longitude. Averaged HEND Data products are composed of averaged normalized counting rates, orbital neutron fluxes and the associated timing, spatial and engineering information. The AHDs consists of the cumulative background subtracted and normalized counts of neutrons at the four HEND detectors averaged over the 5x5 degree latitude longitude, 15-degree Ls. Please refer to the HEND processing document located in the document directory that accompanies this release for a full description of how HEND spectra are processed to yield averaged normalized counting rates and orbital neutron fluxes. 24 0 96 AREOCENTRIC_LATITUDE 1 1 IEEE754MSBSingle 4 degrees Centerpoint areocentric latitude. AREOCENTRIC_EAST_LONGITUDE 2 5 IEEE754MSBSingle 4 degrees Centerpoint areocentric east longitude. EXPOSURE 3 9 IEEE754MSBSingle 4 s Exposure time of given map pixel in seconds. SD_NORMALIZATION 4 13 IEEE754MSBSingle 4 Normalization value which was used to normalize map for the Small Detector (counts/sec). -999 SD_RATE 5 17 IEEE754MSBSingle 4 The relative count rate (after normalization) which is observed in the given map pixel by the Small Detector. -999 SD_ERROR 6 21 IEEE754MSBSingle 4 The statistical error of the relative count rate in the Small Detector. -999 MD_NORMALIZATION 7 25 IEEE754MSBSingle 4 Normalization value which was used to normalize map for the Medium Detector (counts/sec). -999 MD_RATE 8 29 IEEE754MSBSingle 4 The relative count rate (after normalization) which is observed in given map pixel by the Medium Detector. -999 MD_ERROR 9 33 IEEE754MSBSingle 4 The statistical error of relative count rate in the Medium Detector. -999 LD_NORMALIZATION 10 37 IEEE754MSBSingle 4 Normalization value which was used to normalize map for the Large Detector (counts/sec). -999 LD_RATE 11 41 IEEE754MSBSingle 4 The relative count rate (after normalization) which is observed in given map pixel by the Large Detector. -999 LD_ERROR 12 45 IEEE754MSBSingle 4 The statistical error of relative count rate in the Large Detector. -999 IN_SC_LOW_NORMALIZATION 13 49 IEEE754MSBSingle 4 Normalization value which was used to normalize map for low energy channels in the inner scintillator (count/sec). -999 IN_SC_LOW_RATE 14 53 IEEE754MSBSingle 4 The relative count rate (after normalization) which is observed in given map pixel by the inner scintillator (low channels). -999 IN_SC_LOW_ERROR 15 57 IEEE754MSBSingle 4 The statistical error of relative count rate in the inner scintillator (low channels). -999 IN_SC_HIGH_NORMALIZATION 16 61 IEEE754MSBSingle 4 Normalization value which was used to normalize map for high energy channels in the inner scintillator (count/sec). -999 IN_SC_HIGH_RATE 17 65 IEEE754MSBSingle 4 The relative count rate (after normalization) which is observed in given map pixel by the inner scintillator (high channels). -999 IN_SC_HIGH_ERROR 18 69 IEEE754MSBSingle 4 The statistical error of relative count rate in the inner scintillator (high channels). -999 EPITHERMAL_FLUX1 19 73 IEEE754MSBSingle 4 Orbital epithermal neutron flux in energy range [100 eV-10 keV] (n/cm^2/sec). -999 EPITHERMAL_FLUX2 20 77 IEEE754MSBSingle 4 Orbital epithermal neutron flux in energy range [10 keV-1 MeV] (n/cm^2/sec). -999 FAST_FLUX1 21 81 IEEE754MSBSingle 4 Orbital fast neutron flux in energy range [1 MeV - 2.5 MeV] (n/cm^2/sec). -999 FAST_FLUX2 22 85 IEEE754MSBSingle 4 Orbital fast neutron flux in energy range [2.5 MeV - 10 MeV] (n/cm^2/sec). -999 NEUTRON_NORMALIZATION 23 89 IEEE754MSBSingle 4 Normalization of neutron spectra. -999 ALPHA 24 93 IEEE754MSBSingle 4 Power index of neutron spectra. -999 ahd_13_030_045.lbl 0 PDS3 PDS3 label Carriage-Return Line-Feed