Voyager LECP Data Analysis Handbook
Data File Descriptions
Experiment Data Record (EDR) Format Specification
APPENDIX C: Standard EDR Header Format
The Standard Record Header described in the following pages is designed to be utilized as the record header for all physical records written to an EDR tape.
Part A of this section describes the Standard Record Header for extracted data from data modes GS-2, GS-3, GS-4, OC-1, IM-1 thru IM-12, PB-1, PB-2 and PB-3. If the source data for PB-4 and PB-5 was one of the above, then this record header will be used. The contents and record structure are described in Figure C-1 and Table C-10.
Figure C-1. Standard Experiment Data Record Header
| EDR Data Word |
Bit 31 24 16 8 |
0 |
31 24 16 |
8 |
0 |
|||||||
| 1 |
Project Identification |
Rec. ID |
S/C ID |
Physical Record |
S/C Data Mode | A | B | Spare | ||||
| 3 |
Starting ERT Hour of Current Year |
Starting ERT Sec. of Current Hour |
Starting ERT Millisec. of Curr. Sec. |
Year | C | D | Seg. No. | |||||
| 5 |
Ending ERT Hour of Current Year |
Ending ERT Sec. of Current Hour |
Ending ERT Millisec. of Curr. Sec. |
Year | Software Version | |||||||
| 7 |
SCET Hour of Current Year |
SCET Sec. of Current Hour |
SCET Millisec. of Curr. Sec. |
Year | SCE Flag | FDSC Corr Flag | ||||||
| 9 |
MOD 216 Count |
MOD 60 Count |
Line Count |
Downlink TLM Rate | Effective Experiment Bit Rate | FID | ||||||
| 11 | BET | DSN Config |
Ground Receiver AGC | DSN Station | Spare | PN EBEC | ||||||
| 13 | Symbol SNR | Decoder SNR | Physical Record No. or Unused | DQSW *MF 17 - MF 24 MF 1 - MF 8 |
||||||||
| 15 |
DQSW *MF 25 - MF 32 MF 9 - MF 16 |
DQSW *MF 33 - MF 40 MF 17 - MF 24 |
DQSW *MF 41 - MF 48 MF 25 - MF 32 |
DQSW *MF 49 - MF 56 MF 33 - MF 40 |
||||||||
| 17 | DQSW *MF 57 - MF 64 MF 41 - MF 48 |
DQSW *MF 64 - MF 72 MF 49 - MF 56 |
DQSW *MF - 73 - MF 80 MF 57 - MF 64 |
DQSW *MF 1 - MF 8 MF 65 - MF 72 |
||||||||
| 19 |
DQSW *MF 9 - MF 16 MF 73 - MF 80 |
DPI *MF 17 MF 1 |
GCI *MF 17 MF 1 |
DPI *MF 18 MF 2 |
GCI *MF 18 MF 2 |
DPI *MF 19 MF 3 |
GCI *MF 19 MF 3 |
|||||
|
: |
... ... |
|||||||||||
| 59 | DPI *MF 16 MF 80 |
GCI *MF 16 MF 80 |
IRIS DPI MF 17 |
IRIS GCI MF 17 |
DRS Data Type |
GOLAY Correc- tion BEC |
GOLAY Bit Error Summation |
|||||
A = Engineering Flag
B = S/C Playback Flag
C = Data Source
D = Golav Encoded Flag
*These fields require a special minor frame definition for IRIS and ENG EDRS.
For interpretation of day number and hour of day from hour of year, divide the number of hours by 24. The whole number is the day, the remainder is the hour of that day.
Examples:
36 Hours: 36/24 = 1 Remainder 12 = day 1, hour 12 = Jan 1, 12 PM
3500 Hours: 3500/24 = 145 Remainder 20 = day 145, Hour 20 = May 25, 8 PM
Next: Cruise 1
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LECP Data Analysis Handbook Table of Contents.
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Updated 8/9/19, Cameron Crane
VOYAGER 1 ELAPSED TIME
*Since official launch
September 5, 1977, 12:56:00:00 UTC
VOYAGER 2 ELAPSED TIME
*Since official launch
August 20, 1977, 14:29:00:00 UTC
QUICK FACTS
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.