urn:nasa:pds:a12side_ccig_raw_arcsav:data:a12_side_1975_l1_arcsav_cv_tab 1.0 1.7.0.0 Product_Observational 1975-04-03T12:24:32.827Z 1975-07-01T13:39:33.566Z 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_cv.tab 4218 268

Header 0 38 7-Bit ASCII Text

CVLog 38 267 The table contains a log of Command Verification (CV) messages received by Apollo 12 ALSEP for Suprathermal Ion Detector Experiment (SIDE) and Cold Cathode Ion Gage Experiment (CCIG) operations. Command Verification is provided in ALSEP Word 46 as ALSEP measurement numbers DA-5 and DA-6. Each CV message consists of the command code received and one bit flag that indicates if command parity error check was successful and the command was acted upon. The earth-received time column and the CV message columns are followed by a quality flag. Records are time-ordered by the earth-received time. Carriage-Return Line-Feed 6 0 38 EarthReceivedTime 1 1 ASCII_String 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 Command Verification was received at a ground tracking and receiving station on earth. EarthReceivedTime_Flag 2 23 ASCII_String 1 %1s 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. CV 4 30 ASCII_Numeric_Base8 3 %3o Command Verification (also known as the command counter code) is a 7-bit command received, represented as octal values. Octal CV values for SIDE/CCIG operations are 33, 52-54, 104-107, and 110. Measurement number DA-5 from bits 3-9 of ALSEP Word 46. MAP 5 34 ASCII_Integer 1 %1d DN Message Acceptance Pulse (MAP) bit flag is set to the value 1 when the command parity error check was successful and the command was accepted and acted upon. The value 0 indicates the command parity check failed. Measurement number DA-6 from bit 10 of ALSEP Word 46. CV_Flag 6 36 ASCII_String 1 %1s This field is set one of two values: An asterisk (*) indicates the CV and/or its MAP has a suspected read or transmission error; A negative sign (-) indicates these values do not have a suspected read or transmission error or that it is unknown if there was an error.