Voyager In Space

 

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VOYAGER

Voyager LECP Data Analysis Handbook

 

Data File Descriptions

 

Master Rate (Tape) File Descriptions

 

Appendix A

 

LECP VIM/Cruise-5A Science Record on EDR

 

Standard Header Subheader Data Block 20 MF
120 16-bit words 2 words 160 words 3.2 minutes = 192 sec
1 121 123 283

 

LECP VIM/Cruise-5A Data in Science Record on EDR

 

P(7:0) P P P P P P P P P 1 2 3 4 5 6
8 9 P P P P P P P P P P 1 2 3 4  
5 6 8 9 P P P P P P P P P P P 1  
2 3 4 5 6 8 9 7 10 11 12 13 15 16 17 P P(39:8)
Split record here

 

P = PHA (40 bits = 5 bytes)
# = Rate Group (40 bits = 4 10-bit rates). See LECP Rate Groups, Far Encounter and Cruise Modes, for definition.
20 minor frames of 16 bytes each cover 3.2 minutes = 102 seconds of data = 4 MOD60
32 Rate groups, 32 PHA but the last PHA straddles a record boundary: the final 8 bits of a PHA readout from the previous record occur first.
320 bytes per record

LECP VIM/Cruise 5 Data Map

 

P P P P P P P P P P 1 2 3 4 5 6
8 9 P P P P P P P P P P 1 2 3 4
5 6 8 9 P P P P P P P P P P P 1
2 3 4 5 6 8 9 7 10 11 12 13 15 16 17 P

 

LECP VIM/Cruise-5A Data Present Indicators in Standard Header

 

Word (16-bit) 37 38 39 40
Word (32-bit) 19         MF1 2 3 4 5 6 7 8 9 10 11 12
Word (32-bit) 21 13 14 15 16 17 18 19 20          
  41 42 43 44

 

Word numbers start at 1.
Data Present Indicators are 4 bits each for 20 minor frames = 0000 if data present, = 1111 if data not present.
Do not swap these bytes and they will be in correct order.
Each minor frame applies to 128 bits or 16 bytes of LECP data.

 

Next: Appendix B 

 

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Updated 8/9/19, Cameron Crane

VOYAGER 1 ELAPSED TIME

--:--:--:--
Days: Hours: Minutes: Seconds

*Since official launch
September 5, 1977, 12:56:00:00 UTC

VOYAGER 2 ELAPSED TIME

--:--:--:--
Days: Hours: Minutes: Seconds

*Since official launch
August 20, 1977, 14:29:00:00 UTC

QUICK FACTS

Manufacturer: Voyagers 1 and 2 were built in the Jet Propulsion Laboratory in Southern California.

Mission Duration: 40+ years have elapsed for both Voyager 1 and Voyager 2 (both are ongoing).

Destination: Their original destinations were Saturn and Jupiter. Their current destination is interstellar space.