PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH FILE_RECORDS = 1879 RECORD_BYTES = 119 ^TABLE = "VL2C2RC.TAB" DATA_SET_ID = "VL1/VL2-M-LR-2-EDR-V1.0" PRODUCT_ID = "VL2C2RC.TAB" PRODUCT_CREATION_TIME = 2001-07-05T09:00:00 SPACECRAFT_NAME = "VIKING LANDER 2" INSTRUMENT_NAME = "LABELED RELEASE MODULE" TARGET_NAME = MARS OBSERVATION_TYPE = "Viking Lander 2 Cycle 2 Sample" START_TIME = 1976-10-03T07:43:35 STOP_TIME = 1976-10-23T07:07:35 OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 1879 ROW_BYTES = 119 COLUMNS = 12 DESCRIPTION = "Radioactivity measurements made during Viking Lander 2 cycle 2. This cycle included two nutrient injections, which occurred at: Injection MMT Local Lander Time UTC 1 3043010 34/06:50:52 1976-10-08T18:05:35 2 3394310 38/05:47:31 1976-10-12T19:40:35" OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = RAW_COUNTS DATA_TYPE = ASCII_REAL START_BYTE = 1 BYTES = 10 DESCRIPTION = "Raw radioactivity counts measured by the Labeled Release beta detectors. Data are given in counts/minute." FORMAT = "F10.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = BACKGROUND_CORRECTED_COUNTS DATA_TYPE = ASCII_REAL START_BYTE = 12 BYTES = 10 DESCRIPTION = "Radioactivity counts with a background value subtracted. The background value was determined by averaging measurements acquired prior to the first injection of this analysis cycle. A constant background value was used for the entire cycle." FORMAT = "F10.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = CHANNEL_NUMBER DATA_TYPE = ASCII_INTEGER START_BYTE = 23 BYTES = 3 DESCRIPTION = "Code used to designate which beta detector (channel) was used for a given measurement. Radioactivity could be counted using one or both detectors. Channel numbers 10 and 20 refer to the right and left detectors, respectively. Channel number 0 means that both detectors was used. Radioactivity values are approximately twice as large when both detectors were used." FORMAT = "I3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = MARS_MISSION_TIME DATA_TYPE = ASCII_INTEGER START_BYTE = 27 BYTES = 9 DESCRIPTION = "Mars mission time (MMT) is the number of seconds past midnight of Sol 0 (day of landing). Mars mission time is the primary time system used by the Labeled Release experiment. Additional time fields in this data set are derived from the Mars mission time." FORMAT = "I9" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = NATIVE_TIME DATA_TYPE = CHARACTER START_BYTE = 38 BYTES = 12 DESCRIPTION = "Native time is the local lander time given as a sol number followed by hours, minutes, and seconds past local midnight on that sol. A sol is a martian solar day with Sol 0 as day of landing. Native time is computed from Mars mission time assuming that a sol is 88775.241 seconds." FORMAT = "A12" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = OBSERVATION_TIME DATA_TYPE = TIME START_BYTE = 52 BYTES = 19 DESCRIPTION = "The UTC date and time of a given measurement. Observation time was computed from Mars mission time." FORMAT = "A19" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = HOURS_FROM_FIRST_INJECTION DATA_TYPE = ASCII_REAL START_BYTE = 72 BYTES = 9 DESCRIPTION = "This field gives the measurement time as hours since the first nutrient injection. Values are expressed as decimals. Negative values indicate times before the nutrient injection. This field is computed from Mars mission time." FORMAT = "F9.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = HOURS_FROM_SECOND_INJECTION DATA_TYPE = ASCII_REAL START_BYTE = 82 BYTES = 9 DESCRIPTION = "This field gives the measurement time as hours since the second nutrient injection. Values are expressed as decimals. Negative values indicate times before the nutrient injection. This field is computed from Mars mission time." FORMAT = "F9.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = SOLS_FROM_SOL_34 DATA_TYPE = ASCII_REAL START_BYTE = 92 BYTES = 8 DESCRIPTION = "This field gives measurement time in terms of the number of sols since the start of Sol 34 (i.e., near the start of the measurement sequence). Values are expressed as decimals. This field is computed from Mars mission time assuming the length of a sol is 88775.241 seconds." FORMAT = "F8.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = COUNTING_INTERVAL DATA_TYPE = ASCII_INTEGER START_BYTE = 101 BYTES = 6 DESCRIPTION = "The time interval used for counting radioactivity. LR radioactivity data are generally counted for periods of 960 seconds (16 minutes). The counting interval was as short as 120 seconds near the time of nutrient injection. Values are given in seconds." FORMAT = "I6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = DELTA_MMT DATA_TYPE = ASCII_INTEGER START_BYTE = 108 BYTES = 6 DESCRIPTION = "The number of seconds between the current measurement and the previous one. This field is computed as the difference in Mars mission time between the current and previous measurements. Values greater than 960 seconds may indicate a data gap." FORMAT = "I6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = OBSERVATION_NOTE DATA_TYPE = CHARACTER START_BYTE = 116 BYTES = 1 DESCRIPTION = "This field is used to note possible anomalous radioactivity values. This field contains an 'A' if the radioactivity value is more than four standard deviations from the mean value of the surrounding 100 measurements. A value of 'M' in this field means that the channel mode switched between single or dual detector counting mode. In general the mode did not switch on a measurement time boundary, such that the value reported during the switch may be anomalous." FORMAT = "A1" END_OBJECT = COLUMN END_OBJECT = TABLE END