PDS_VERSION_ID                 = PDS3

/* FILE CHARACTERISTICS */
RECORD_TYPE                    = FIXED_LENGTH
RECORD_BYTES                   = 256
FILE_RECORDS                   = 2255

/* POINTERS TO DATA OBJECTS */
^TIME_SERIES                   = "DND_20210708.DAT"

/* IDENTIFICATION DATA ELEMENTS */
DATA_SET_NAME                  = "ODY MARS GAMMA RAY SPECTROMETER 4 DND V2.0"
DATA_SET_ID                    = "ODY-M-GRS-4-DND-V2.0"
PRODUCT_ID                     = "DND_20210708"
PRODUCT_TYPE                   = "DERIVED_NEUTRON_DATA"
PRODUCT_VERSION_ID             = "1.0"
RELEASE_ID                     = "0079"

/* DESCRIPTIVE DATA ELEMENTS */
INSTRUMENT_HOST_NAME           = "2001 MARS ODYSSEY"
INSTRUMENT_NAME                = "GAMMA RAY SPECTROMETER"
SPACECRAFT_ID                  = ODY
TARGET_NAME                    = MARS
MISSION_PHASE_NAME             = "EXTENDED MISSION"
START_TIME                     = 2021-07-08T06:42:06.095
STOP_TIME                      = 2021-07-08T23:59:56.026
SPACECRAFT_CLOCK_START_COUNT   = "335409819109"
SPACECRAFT_CLOCK_STOP_COUNT    = "335425760225"
PRODUCT_CREATION_TIME          = 2022-03-21T14:42:22

/* DATA OBJECT DEFINITION */
OBJECT                         = TIME_SERIES

  INTERCHANGE_FORMAT           = BINARY
  ROWS                         = 2255
  ROW_BYTES                    = 256

  SAMPLING_PARAMETER_NAME      = TIME
  SAMPLING_PARAMETER_UNIT      = TICKS
  SAMPLING_PARAMETER_INTERVAL  = "N/A"

  /* The complete column definitions are contained in an external file */
  /* found in the LABEL directory of the archive disk.                 */
  
  COLUMNS                      = 53
  ^STRUCTURE                   = "DERIV_NEUTRON_DATA_COLS.FMT"

  /* DESCRIPTIVE data elements */
  DESCRIPTION                  = "
  The DND product contains normalized neutron counting rates for all four of
  the Neutron Spectrometer prisms, from which thermal and epithermal neutron
  count rates are determined. 

  Thermal and epithermal count rates are included in the data set.
  Background-corrected and normalized fast counting data are also provided for
  the nadir-looking prism (Prism 1).  The data is presented in a table format
  with one row of data for each NS collection interval within a 24 Earth hour
  period. The DND data can be used along with models and calibration
  procedures described in the literature [Feldman et al., 2003; Prettyman et
  al., 2004] to study the composition and structure of the surface and
  atmosphere of Mars on sub-seasonal time scales.
  "

END_OBJECT                     = TIME_SERIES

END