PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2004-04-01 NOTE = "Definitions of quality flags in the BAD_CODE column of GRS spectra data files." END_OBJECT = TEXT END Gamma Bad Flags =============== Decimal Bad Flag Name Number Definition --------------------------------------------------------------------- BAD_HV_STATE 1 The high voltage is not on, is being ramped or has not been stable long enough. BAD_PUL_COMB 2 Pulsers are set to be "combined" with the gamma spectra. These spectra should not be processed the same way or combined with regular gamma spectra. BAD_GAIN_SHFT 4 Indicates a change in the analog pulse processing system gain setting. BAD_TEMP_SHFT 8 Indicates a spectrum where the temperatures used for correction have fluctuated by greater than 5 percent from previous readings. BAD_GHOST_PK 16 Ghost peaks are caused by an overload in the analog pulse processing system electronics. If the conditions that cause ghost peaks are met the spectra is marked as bad. BAD_SOLAR_PARTICLE_EVENT 32 Indicates gamma spectra collected during a solar particle event. These spectra should not be combined with spectra collected under normal solar conditions. BAD_COMP_SET 64 N/A for PDS data products. BAD_OTHER 128 Indicates a unique problem with single spectrum. BAD_NULL 256 Indicates a gamma sum that contains an unexpected NULL value. This bad code is N/A for PDS products. BAD_HV 512 N/A for PDS data products. BAD_GAIN 1024 N/A for PDS data products BAD_OFFSET 2048 N/A for PDS data products BAD_NUM_CONT 4096 N/A for PDS data products BAD_CONT_PEAK 8192 N/A for PDS data products BAD_DATA_GAP 16384 Indicates a data gap in the engineering channels used to correct the gamma spectrum. BAD_PULSER_SHIFT 32768 N/A for PDS data products BAD_SOLAR_FLARE 65536 Indicates gamma spectra collected during a solar flare event. These spectra should not be combined with spectra collected under normal solar conditions. BAD_RESOLUTION 131072 Indicates gamma spectra collected during periods of decreased GS detector spectral resolution. These spectra should not be combined with spectra collected under "normal" detector conditions. BAD_UHF_TEST 262144 Indicates spectra collected during tests of the Odyssey UHF transmitter. BAD_HV_TRANSITION 524288 Indicates spectra collected during periods when the high voltage has fluctuated for some reason. This flag is used as a blanket bad flag to cover the time period from the last good data to the first good data after any spacecraft event. BAD_OFF_POINT 1048576 Indicates times when the Odyssey spacecraft has been pointed away from Mars. BAD_VECTOR 2097152 Indicates spectra that have failed the vector_check program See the latest version of the GRS_Gamma_Processing.pdf document for a more complete description of the gamma bad flags. Neutron Spectrometer Bad Flags ============================== Decimal Bad Flag Name Number Definition --------------------------------------------------------------------- NS_HVPS_NOT_STABLE 1 Indicates spectra collected when the NS high voltage power supply is not stable NS_HVPS_GAIN_CHANGE 2 Indicates a change in the NS high voltage power supply gain. NS_BAD_GCR_COUNT 4 Indicates spectra collected when the Galactic Cosmic-ray count is above 3000. NS_BAD_SC_DIRECTION 8 N/A for PDS data products. NS_MISSING_PRISM 16 Indicates data is missing for one (or more) of the four NS prisms. NS_HVPS_SWITCH 32 Indicates a switch between high voltage power supply 1 and high voltage power supply 2. HEND Bad Flags ============== Currently bad flags are not set in the HEND data. It is possible this could change in future data releases. Pulser Bad Flags ================ Currently bad flags are not set in the Pulser data. It is possible this could change in future data releases. Profile Bad Flags ================= Currently bad flags are not set in the Profile data. It is possible this could change in future data releases.