PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 57 FILE_RECORDS = 25173 ^SDC_ON_OFF_HEADER = ("SDC_ON_OFF_TIMES_V0827_ALT.TAB", 1) ^SDC_ON_OFF_TABLE = ("SDC_ON_OFF_TIMES_V0827_ALT.TAB", 3) MISSION_NAME = "NEW HORIZONS" DATA_SET_ID = "NH-X-SDC-2-LAUNCH-V2.0" PRODUCER_INSTITUTION_NAME = "SOUTHWEST RESEARCH INSTITUTE" PRODUCT_CREATION_TIME = 2014-01-16T00:00:00 INSTRUMENT_NAME = "STUDENT DUST COUNTER" INSTRUMENT_HOST_NAME = "NEW HORIZONS" INSTRUMENT_ID = "SDC" DESCRIPTION = "The alternate table pointed to by this label contains the times when the SDC channels were switched on or off. The alternate table is derived from the delivered file SDC_ON_OFF_TIMES_V0827.TAB. The delivered file, SDC_ON_OFF_TIMES_V0827.TAB, was sorted by ascending channel, then by ascending time. So an on/off event on a lower channel will be earlier in the file than an earlier event on a higher channel. In this alternate table, the sort order is by ascending time, then ascending channel, so later events are later in the file and earlier events are earlier, regardless of on which channel they occur." OBJECT = SDC_ON_OFF_HEADER BYTES = 57 HEADER_TYPE = TEXT INTERCHANGE_FORMAT = ASCII RECORDS = 2 DESCRIPTION = "Column descriptions for the SDC on-off table" END_OBJECT = SDC_ON_OFF_HEADER OBJECT = SDC_ON_OFF_TABLE NAME = "SDC ON-OFF TABLE" INTERCHANGE_FORMAT = ASCII ROWS = 25173 COLUMNS = 4 ROW_BYTES = 57 DESCRIPTION = "Table giving the times each SDC channel was switched on or off. This includes, but does not distinguish between, events initiated either by spacecraft commanding or by SDC autonomy. The ordering of events in this file is by time, then channel number. This table is crucial for converting event counts from a channel into a counting rate, because any time period when a channel was turned off should be excluded from such a calculation." OBJECT = COLUMN NAME = "UTC" START_BYTE = 2 BYTES = 23 COLUMN_NUMBER = 1 DATA_TYPE = TIME FORMAT = "A23" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPACECRAFT CLOCK COUNT" START_BYTE = 28 BYTES = 18 COLUMN_NUMBER = 2 DATA_TYPE = CHARACTER FORMAT = "A18" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CHANNEL NUMBER" DESCRIPTION = "The channel number of the ON/OFF event; the numbering convention in this table is one-based (from 1 through 14) for the 14 SDC detector channels. Note that in some contexts, most notably in the SDC raw data products, the numbering convention is zero-based (from 0 through 13). " START_BYTE = 48 BYTES = 2 COLUMN_NUMBER = 3 DATA_TYPE = ASCII_INTEGER FORMAT = "I2" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "NEW STATE (ON/OFF)" START_BYTE = 52 BYTES = 3 COLUMN_NUMBER = 4 DATA_TYPE = CHARACTER FORMAT = "A3" END_OBJECT = COLUMN END_OBJECT = SDC_ON_OFF_TABLE END