urn:nasa:pds:vg2-pra-jup:data-lowband-6sec:pra-iii 1.0 1.25.0.0 Product_Observational 1997 This product contains high time resolution and low rate receiver band 6 second sweep data from the Radio Astronomy instrument on Voyager 2 from the Jupiter encounter. The data are provided for 70 low band channels ranging from 1326.0 to 1.2 kHz and spaced 19.2 kHz apart. Columns STATUS_WORD and DATA_CHANNELS are grouped together in the SWEEP_STRUCTURE GROUP and repeated 8 times (8 sweeps through the PRA receiver). Additionally, each occurrence of the column DATA_CHANNELS consists of 70 4-byte data channel values. As a result, a single TABLE record contains 570 fixed width (undelimited) fields. Michael L. Kaiser Goddard Space Flight Center https://ror.org/0171mag52 1 James Walter Warwick University of Colorado System https://ror.org/00jc20583 2 2026-04-30 1.0 Original PRA_III.TAB from the PDS3 VG2-J-PRA-3-RDR-LOWBAND-6SEC-V1.0 dataset, DATA directory, migrated to PDS4. 1979-06-24T00:00:47.000Z 1979-07-12T23:59:58.000Z Science Calibrated Magnetosphere Fields Electric Waves Magnetosphere Fields Magnetic Waves Voyager Mission urn:nasa:pds:context:investigation:mission.voyager data_to_investigation Voyager 2 Host urn:nasa:pds:context:instrument_host:spacecraft.vg2 is_instrument_host Planetary Radio Astronomy Receiver Instrument urn:nasa:pds:context:instrument:vg2.pra is_instrument Jupiter Planet urn:nasa:pds:context:target:planet.jupiter data_to_target Jupiter Encounter 20181:22:785 20751:21:787 2 urn:nasa:pds:vg2-pra-jup:document:data-desc-lowband-6sec data_to_document VG2-J-PRA-3-RDR-LOWBAND-6SEC-V1.0:PRA_III:PRA_III.TAB data_to_calibrated_source_product 10.17189/1519955 PDS Planetary Plasma Interactions Node The DOI provided references the PDS3 source data set. PRA_III.TAB 1997-10-01 72356472 31652 d102b26e42f20be555d75fba8b6a7395 0 31652 Carriage-Return Line-Feed 2 1 2286 DATE 1 1 ASCII_Integer 6 This column indicates the Spacecraft Event Time (SCET) year, month and day of the sample in years at the start of the first sweep for the record in the format YYMMDD. SECOND 2 7 ASCII_Integer 6 s This column indicates seconds of day, to the nearest second, at the start of the sweep. SWEEP STRUCTURE 8 1 1 The data here are 'packaged' into spacecraft major frame records. Each major frame is 48 seconds long or eight sweeps through the PRA receiver. Each sweep consists of a single 4-byte status word followed by 70 4-byte data channel values. The first value in each sweep (1326.0 kHz) occurs some 3.9 seconds after the beginning of the sweep. Successively lower frequencies are spaced 0.03 seconds apart. Only one time is given for the entire major frame, thus the start of each sweep is the time given plus 6 times the sweep number minus 1 (i.e. 0 through 7). 13 2272 STATUS WORD 1 ASCII_Integer 4 This column contains a status word for which the 12 least significant bits have been used, although not all 12 have meaning for PRA low band. Numbering those bits 0 for least significant to 11 for most significant, the bits that have meaning are as follows: bit 0: 15 dB attenuator in use when equal to 1 1: 30 dB attenuator in use when equal to 1 2: 45 dB attenuator in use when equal to 1 9,10 (together): polarization of first channel sampled (1326.0 kHz) according to the scheme: value bit 10 = 0 1 value bit 9 = 0 R L 1 L R Polarization at successively lower frequencies is opposite to the frequency above it, i.e. either a LRLR or an RLRL pattern. Successive 6-second sweeps start on the opposite polarization as the previous sweep as indicated in the status bits. Note that this polarization is the received polarization, not necessarily the emitted polarization. Correct interpretation of the received polarization depends on the antenna plane orientation relative to the radio source. If the status word is zero, any data in that receiver sweep should be discarded. 0 SWEEP STRUCTURE 70 1 0 5 280 DATA CHANNELS 4 1 ASCII_Integer 4 mB This column consists of 70 low band channels ranging from 1326.0 to 1.2 kHz and spaced 19.2 kHz apart. Data are calibrated and given in units of 'milibells' which is 1000 times the log of the received power. Zero milibells corresponds to approximately 1.4 x 10^-21 W m^-2 Hz^-1, however, this value is never seen in practice. The minimum values detected, which includes internal and spacecraft generated noise, are about 2300 to 2400 millibels, or about 3.5 x 10^-19 W m^-2 Hz^-1. Missing or bad data values are set to zero. 0