PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 369 FILE_RECORDS = 78679 ^INDEX_TABLE = "UHCINDEX.TAB" INSTRUMENT_HOST_NAME = "MESSENGER" INSTRUMENT_NAME = " MERCURY ATMOSPHERIC AND SURFACE COMPOSITION SPECTROMETER" START_TIME = 2004-08-27T22:06:46.0 STOP_TIME = 2015-04-30T15:03:45.0 PRODUCT_CREATION_TIME = 2016-01-27T16:35:13.0 OBJECT = INDEX_TABLE INDEX_TYPE = SINGLE INTERCHANGE_FORMAT = ASCII ROWS = 78679 ROW_BYTES = 369 COLUMNS = 22 DESCRIPTION = " This table contains the volume index of all UVVS Header CDR data files on this volume. Each record of this index consists of comma delimited data columns folowed by an ASCII carriage-return and line-feed. The row bytes value of includes not only the lengths of the values themselves, but also any quotes, the commas, and the carriage-return / line-feed characters." OBJECT = COLUMN NAME = VOLUME_ID COLUMN_NUMBER = 1 START_BYTE = 2 BYTES = 12 DATA_TYPE = CHARACTER DESCRIPTION = "The PDS VOLUME_ID." END_OBJECT = COLUMN OBJECT = COLUMN NAME = FILE_SPECIFICATION_NAME COLUMN_NUMBER = 2 START_BYTE = 17 BYTES = 68 DATA_TYPE = CHARACTER DESCRIPTION = "Fully qualified name of the data file, relative to the volume root directory" END_OBJECT = COLUMN /* Note that the file specification orginates at the root, so no */ /* logical volume path name is included. */ OBJECT = COLUMN NAME = MISSION_PHASE_NAME COLUMN_NUMBER = 3 START_BYTE = 88 BYTES = 20 DATA_TYPE = CHARACTER DESCRIPTION = "The mission phase during which the observations were obtained." END_OBJECT = COLUMN OBJECT = COLUMN NAME = TARGET_NAME COLUMN_NUMBER = 4 START_BYTE = 111 BYTES = 20 DATA_TYPE = CHARACTER DESCRIPTION = "The target observed." END_OBJECT = COLUMN OBJECT = COLUMN NAME = PRODUCT_ID COLUMN_NUMBER = 5 START_BYTE = 134 BYTES = 31 DATA_TYPE = CHARACTER DESCRIPTION = "PRODUCT_ID from the PDS label" END_OBJECT = COLUMN OBJECT = COLUMN NAME = PRODUCT_VERSION_ID COLUMN_NUMBER = 6 START_BYTE = 168 BYTES = 3 DATA_TYPE = CHARACTER DESCRIPTION = "PRODUCT_VERSION_ID from the PDS label" END_OBJECT = COLUMN OBJECT = COLUMN NAME = PRODUCT_CREATION_TIME COLUMN_NUMBER = 7 START_BYTE = 173 BYTES = 19 DATA_TYPE = TIME DESCRIPTION = "Creation time from the PDS label" END_OBJECT = COLUMN OBJECT = COLUMN NAME = DATA_SET_ID COLUMN_NUMBER = 8 START_BYTE = 194 BYTES = 40 DATA_TYPE = CHARACTER DESCRIPTION = "DATA_SET_ID from the PDS label." END_OBJECT = COLUMN OBJECT = COLUMN NAME = STANDARD_DATA_PRODUCT_ID COLUMN_NUMBER = 9 START_BYTE = 237 BYTES = 11 DATA_TYPE = CHARACTER DESCRIPTION = "STANDARD_DATA_PRODUCT_ID from the PDS label. Identifies the data product in the volume archive." END_OBJECT = COLUMN OBJECT = COLUMN NAME = START_TIME COLUMN_NUMBER = 10 START_BYTE = 250 BYTES = 19 DATA_TYPE = TIME DESCRIPTION = "The UTC START_TIME value from the PDS label" END_OBJECT = COLUMN OBJECT = COLUMN NAME = STOP_TIME COLUMN_NUMBER = 11 START_BYTE = 270 BYTES = 19 DATA_TYPE = TIME DESCRIPTION = "The UTC STOP_TIME value from the PDS label" END_OBJECT = COLUMN OBJECT = COLUMN NAME = START_MET_PARTITION COLUMN_NUMBER = 12 START_BYTE = 290 BYTES = 3 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "The MET partition (roll-over count) associated with the SPACECRAFT_CLOCK_START_COUNT value (column 13). This value is incremented by 1 for every instance where MET values have been reset." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_CLOCK_START_COUNT COLUMN_NUMBER = 13 START_BYTE = 295 BYTES = 15 DATA_TYPE = CHARACTER DESCRIPTION = "The SPACECRAFT_CLOCK_START_COUNT value from the PDS label. This is the MET of the first observation in the data file." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_CLOCK_STOP_COUNT COLUMN_NUMBER = 14 START_BYTE = 313 BYTES = 15 DATA_TYPE = CHARACTER DESCRIPTION = "The SPACECRAFT_CLOCK_STOP_COUNT value from the PDS label. This is the MET of the last observation in the data file" END_OBJECT = COLUMN OBJECT = COLUMN NAME = START_POS COLUMN_NUMBER = 15 START_BYTE = 330 BYTES = 5 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Start position where grating drive begins a scan. Grating drive step position corresponds to a given wavelength being observed by an instrument." END_OBJECT = COLUMN OBJECT = COLUMN NAME = STEP_COUNT COLUMN_NUMBER = 16 START_BYTE = 336 BYTES = 5 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Number of steps the grating drive will take in a scan. This directly corresponds to the range of wavelengths that will be observed in one UVVS observation." END_OBJECT = COLUMN OBJECT = COLUMN NAME = INT_TIME COLUMN_NUMBER = 17 START_BYTE = 342 BYTES = 5 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Integration time in grating drive loop control interrupt periods (nominally 3000 Hz). For example, the actual integration time in seconds is INT_TIME/3000." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SCAN_CYCLES COLUMN_NUMBER = 18 START_BYTE = 348 BYTES = 5 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Number of times to repeat scan." END_OBJECT = COLUMN OBJECT = COLUMN NAME = ZIGZAG COLUMN_NUMBER = 19 START_BYTE = 354 BYTES = 1 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Indicates whether grating drive moves in a 'triangle' (stepping up, then stepping down), or 'sawtooth' (stepping up, then 'flying' down) motion. A 'triangle' observation takes one grating scan stepping up the grating, then reverses direction and takes the next grating scan stepping back down the grating. Scans in opposite directions are offset from one another by two grating step positions such that the wavelength ranges are slightly differentA 'sawtooth' observation takes one grating scan stepping up the grating, then 'flies' the grating back to the START_POSITION to take the next observation. =0 disable, =1 enable." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SLIT_MASK_POS COLUMN_NUMBER = 20 START_BYTE = 356 BYTES = 1 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Indicates whether slit mask is in atmospheric (open) or surface (closed) position. Atmospheric slit results in a 1 deg. by 0.04 deg. instantaneous field of view (iFOV). Surface slit results in a 0.05 deg. by 0.04 deg. iFOV. =0 closed, =1 open." END_OBJECT = COLUMN OBJECT = COLUMN NAME = NUM_SCAN_VALUES COLUMN_NUMBER = 21 START_BYTE = 358 BYTES = 4 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Total number of values or data points in the entire scan observation. Used to determine the number of valid data points in the UVVS Science CDR." END_OBJECT = COLUMN OBJECT = COLUMN NAME = COADD COLUMN_NUMBER = 22 START_BYTE = 363 BYTES = 5 DATA_TYPE = ASCII_INTEGER DESCRIPTION = "Number of steps coadded to make a single observation. Default = 1, i.e. one step per observation." END_OBJECT = COLUMN END_OBJECT = INDEX_TABLE END