^ANCILLARY_STRUCTURE     = "SCIENCE_ANCILLARY.FMT"

    OBJECT                   = COLUMN
      NAME                   = SCIENCE_DATA
      DATA_TYPE              = MSB_BIT_STRING
      START_BYTE             = 187
      BYTES                  = 3600

      OBJECT                 = BIT_COLUMN
        NAME                 = ECHO_SAMPLES
        BIT_DATA_TYPE        = MSB_INTEGER
        START_BIT            = 1
        BITS                 = 8
        ITEMS                = 3600
        ITEM_BITS            = 8
        DESCRIPTION          = "Array of 3600 samples of SHARAD echo return.
                                Each integer value is an antenna voltage
                                estimate at a particular instant in time.
                                These estimates are proportional to voltage
                                but are expressed in data numbers and need to
                                be converted to engineering units. The timing
                                of the samples and other relevant SHARAD
                                instrument parameters are included in the
                                ancillary data segment of each Data Block."
      END_OBJECT             = BIT_COLUMN

    END_OBJECT               = COLUMN