urn:nasa:pds:pvo-sedr:data-pt:1681 1.0 1.22.0.0 Product_Observational 2024 This time_series consists of 6774 records or rows of spacecraft thruster firings or 'pulse time' data for orbit number 1681. Each records consists of a series of various time tags (Fs pulse, RIP pulse, RAM pulse, and NADIR pulse) as well as the type of synchronization used for the pulse. Larry H. Brace 1 Goddard Space Flight Center https://ror.org/0171mag52 2024-11-22 1.0 This product, PVO_SEDR_PT_1681.DAT, was originally released in 1983 as part of the PDS3 PVO-V-POS-6-SEDR-ORBITATTITUDE--V1.0 data set. The metadata have been migrated to PDS4, the data are unchanged. 1983-07-13T12:32:42.452Z 1983-07-14T12:58:30.049Z Engineering Raw Pioneer Venus (PV) Mission urn:nasa:pds:context:investigation:mission.pioneer_venus data_to_investigation Pioneer Venus Orbiter (PVO) Host urn:nasa:pds:context:instrument_host:spacecraft.pvo is_instrument_host Venus Planet urn:nasa:pds:context:target:planet.venus data_to_target Solar Wind Plasma Stream urn:nasa:pds:context:target:plasma_stream.solar_wind data_to_target Venus Orbital Operations 1681 1681 urn:nasa:pds:pvo-sedr:document:data-pt-desc data_to_document Document containing a description of the PVO SEDR Pulse Time Data Collection. PVO-V-POS-6-SEDR-ORBITATTITUDE--V1.0:PT1681.DAT:PT1681.DAT data_to_raw_source_product 10.17189/1519831 PDS Planetary Plasma Interactions Node This is the first version converted to PDS4. The DOI provided references the PDS3 source data set. PVO_SEDR_PT_1681.DAT 2002-01-30T18:00:43 325200 435ade613523e29374a0241414d4fca6 0 1 The header record contains information about the file and its structure as it was originally written to SEDR tape. The header record describes the type of data, block and record sizes, spacecraft id orbit number, and a file identifier. 15 0 48 Logical Header Word 1 1 UnsignedMSB4 4 This object contains the 4 byte long Logical Header Word (LHWD) of the pulse time file. Bits Description Value 1-11 Physical Record Length 120 12-22 Logical Record Length 12 23-27 Logical Records per Physical Record 10 28-32 File Identifier 2 Number Of Logical Records In This File 2 5 UnsignedMSB4 4 This object contains the number of logical data records in this pulse time file. Short Spare 3 9 UnsignedMSB2 2 This object contains a spare (empty) value. Spacecraft ID 4 11 UnsignedMSB2 2 This object contains the spacecraft identification number for the Pioneer Venus Orbiter. The value of this object is always 12. Orbit Number 5 13 UnsignedMSB4 4 This object contains the orbit number of the Pioneer Venus Orbiter for which this data was gathered. Start Year Of Data 6 17 UnsignedMSB2 2 This object contains the four digit year for the first data point in this pulse time file. Start Day Of Year Of Data 7 19 UnsignedMSB2 2 This object contains the three digit day of year, ranging from 1 to 366, for the first data point in this pulse time file. Start Milliseconds Of Day Of Data 8 21 UnsignedMSB4 4 This object contains the milliseconds of the day, where midnight is 0, for the first data point in this pulse time file. Stop Year Of Data 9 25 UnsignedMSB2 2 This object contains the four digit year for the last data point in this pulse time file. Stop Day Of Year Of Data 10 27 UnsignedMSB2 2 This object contains the three digit day of year, ranging from 1 to 366, for the last data point in this pulse time file. Stop Milliseconds Of Day Of Data 11 29 UnsignedMSB4 4 This object contains the milliseconds of the day, where midnight is 0, for the last data point in this pulse time file. Spare 12 33 IEEE754MSBSingle 4 This object contains a spare (empty) value. Spare 13 37 IEEE754MSBSingle 4 This object contains a spare (empty) value. Spare 14 41 IEEE754MSBSingle 4 This object contains a spare (empty) value. Spare 15 45 IEEE754MSBSingle 4 This object contains a spare (empty) value. 48 6774 This time_series consists of 6774 records or rows of spacecraft thruster firings or 'pulse time' data for orbit number 1681. Each records consists of a series of various time tags (Fs pulse, RIP pulse, RAM pulse, and NADIR pulse) as well as the type of synchronization used for the pulse. 15 0 48 Year Of Fs Pulse 1 1 UnsignedMSB2 2 This object contains the four digit year in spacecraft universal time for the smoothed roll reference signal, the F(s) pulse, of the PVO spacecraft. Day Of Year Of Fs Pulse 2 3 UnsignedMSB2 2 This object contains the three digit day of year in spacecraft universal time, ranging from 1 to 366, for the smoothed roll reference signal, the F(s) pulse, of the PVO spacecraft. Milliseconds Of Day Of Fs Pulse 3 5 UnsignedMSB4 4 This object contains the milliseconds of the day in spacecraft universal time, where midnight is 0.00, for the smoothed roll reference signal,the F(s) pulse, of the PVO spacecraft. Year Of RIP Pulse 4 9 UnsignedMSB2 2 This object contains the four digit year in spacecraft universal time for the roll index pulse, which is determined by adjusting the F(s) pulse by the roll index delay angle. Day Of Year Of RIP Pulse 5 11 UnsignedMSB2 2 This object contains the three digit day of year in spacecraft universal time, ranging from 1 to 366, for the roll index pulse, which is determined by adjusting the F(s) pulse by the roll index delay angle. Milliseconds Of Day Of RIP Pulse 6 13 UnsignedMSB4 4 This object contains the milliseconds of the day in spacecraft universal time, where midnight is 0.00, for the roll index pulse, which is determined by adjusting the F(s) pulse by the roll index delay angle. Year Of RAM Pulse 7 17 UnsignedMSB2 2 This object contains the four digit year in spacecraft universal time for the RAM pulse, which is determined by adjusting the RIP pulse by the RAM time delay. Day Of Year Of RAM Pulse 8 19 UnsignedMSB2 2 This object contains the three digit day of year in spacecraft universal time, ranging from 1 to 366, for the RAM pulse, which is determined by adjusting the RIP pulse by the RAM time delay. Milliseconds Of Day Of RAM Pulse 9 21 UnsignedMSB4 4 This object contains the milliseconds of the day in spacecraft universal time, where midnight is 0.00, for the RAM pulse, which is determined by adjusting the RIP pulse by the RAM time delay. Year Of NADIR Pulse 10 25 UnsignedMSB2 2 This object contains the four digit year in spacecraft universal time for the NADIR pulse, which is determined by adjusting the RIP pulse by the NADIR time delay. Day Of Year Of NADIR Pulse 11 27 UnsignedMSB2 2 This object contains the three digit day of year in spacecraft universal time, ranging from 1 to 366, for the NADIR pulse, which is determined by adjusting the RIP pulse by the NADIR time delay. Milliseconds Of Day Of NADIR Pulse 12 29 UnsignedMSB4 4 This object contains the milliseconds of the day in spacecraft universal time, where midnight is 0.00, for the NADIR pulse, which is determined by adjusting the RIP pulse by the NADIR time delay. Milliseconds Since Last Sun Pulse Time 13 33 UnsignedMSB8 8 This object contains the total number of milliseconds since the real actual sun pulse occurred. Pulse Time Status Word 14 41 UnsignedMSB4 4 This object contains the 4 byte long pulse time status word. Bits Description Value 1-2 This parameter is unknown 3-14 Spare (empty) value 15-16 This parameter is unknown 17-18 Spare (empty) value 19-20 Synchronization method used to 3 for sun synchronization determine the F(s) pulse time 1 for star sync 0 or 2 for simulated sync 21-22 Spare (empty) value 23-24 flag value to indicate whether 1 yes firing or not a firing was occurring 0 no firing at this F(s) pulse time 25-32 Spare (empty) value Spare 15 45 IEEE754MSBSingle 4 This object contains a spare (empty) value.