urn:nasa:pds:a12side_ccig_raw_arcsav:data:a12_side_1975_l1_arcsav_hk_tab 1.0 1.7.0.0 Product_Observational 1975-04-03T00:00:17.362Z 1975-07-01T23:58:21.781Z Apollo 12 Mission urn:nasa:pds:context:investigation:mission.apollo_12 data_to_investigation Apollo 12 ALSEP Spacecraft urn:nasa:pds:context:instrument_host:spacecraft.a12a is_instrument_host Apollo 12 Suprathermal Ion Detector Experiment Instrument urn:nasa:pds:context:instrument:side.a12a is_instrument Apollo 12 Cold Cathode Ion Gage Experiment Instrument urn:nasa:pds:context:instrument:ccig.a12a is_instrument MOON Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target a12_side_1975_l1_arcsav_hk.tab 6237484 141761

Header 0 44 7-Bit ASCII Text

TimeOffsets 44 1 This table provides derived sampling-rate-adjusted delay time as an offset in milliseconds for computing the time for each data measurement in each RawHK Table record. The recorded time stamp provided in the first column of each RawHK record is the reference earth-received time for the sequence of data measurements within that record. To compute the start time for a specific data measurement, add the milliseconds time offset, found in this single-record table TimeOffsets for the data measurement column of interest, to the recorded time stamp in the first column of the RawHK record containing the data measurement of interest. Carriage-Return Line-Feed 2 0 44 AI-1_TimeOffset 1 30 ASCII_Integer 4 %4d ms Timing offset for Measurement Number AI-1. Add this value to the time stamp in the first column of a RawHK Table record to derive the time for the corresponding AI-1 data value in that record. AI-2_TimeOffset 1 37 ASCII_Integer 4 %4d ms Timing offset for Measurement Number AI-2. Add this value to the time stamp in the first column of a RawHK Table record to derive the time for the corresponding AI-2 data value in that record. RawHK 88 141759 This table contains raw digital analog Housekeeping data specific to SIDE operation. Housekeeping is contained in ALSEP Word 33. Each record begins with the reference earth-received time for the set of data in that record followed by two raw digital analog measurements identified by their SIDE Measurement Number, AI-N: AI-1 contains the low-energy detector (Mass Analyzer) count rate and AI-2 contains the high-energy detector (Total Ion Detector) count rate. The earth-received time column and each data measurement column are followed by a quality flag. Records are ordered by the earth-received time. Carriage-Return Line-Feed 7 0 44 EarthReceivedTime 1 1 ASCII_Date_Time_DOY 21 %-21s Day of year and time (Universal Time, formatted as yyyy-dddThh:mm:ss.sss) when the first word of the ALSEP frame containing the sequence of housekeeping measurements within this record was received at a ground tracking and receiving station on earth. Each housekeeping measurement has time offset (delta t) from this earth-received time. These timing offsets are contained in the single-record, TimeOffsets Table. EarthReceivedTime_Flag 2 23 ASCII_String 1 This field is set one of two values: An asterisk (*) indicates this EarthReceivedTime value is from ground software clock; has a suspected transmission, data synchronization or tape read error in the value; or is clearly outside the expected range for this restoration effort. A negative sign (-) indicates this value is the earth-received time, and the value does not have a suspected read or transmission error or that it is unknown if there was an error. stat 3 25 ASCII_String 4 %4s This field contains four 1-byte flags as copied from the ARCSAV tapes. The four flags from left to right are: 1) unedited time sync status; 2) unedited data sync status; 3) edited time sync status; 4) edited data sync status. Values range from 0 to 7. AI-1 4 31 ASCII_Integer 3 %3d DN Measurement Number AI-1. Low-energy (Mass Analyzer) count rate measurement read from ALSEP Word 33 of ALSEP frame number 70. -9 AI-1_Flag 5 35 ASCII_String 1 %1s This field is set one of two values: An asterisk (*) indicates this data measurement has a suspected read or transmission error; A negative sign (-) indicates this data measurement does not have a suspected read or transmission error or that it is unknown if there was an error. AI-2 6 38 ASCII_Integer 3 %3d DN Measurement Number AI-2. High-energy detector (Total Ion Detector) count rate measurement read from ALSEP Word 33 of ALSEP frame number 85. -9 AI-2_Flag 7 42 ASCII_String 1 %1s This field is set one of two values: An asterisk (*) indicates this data measurement has a suspected read or transmission error; A negative sign (-) indicates this data measurement does not have a suspected read or transmission error or that it is unknown if there was an error.