Fundamental TechnologiesVoyager LECP Pages |
TO: E. P. Keath
FROM: B. Joy Hook
SUBJECT: Changes to S1P063 to Make S1P070
REFERENCE: 618-306 Revision D
Operational changes
A. Handles Cruise 5A telemetry mode
B. Keeps engineering data on MRT
Changes to output files
A. MRT file
B. MPT file
The input format of an LECP VIM/Cruise-5A Science Record on EDR file is given in Ref. 1 and in Appendix A. The resulting MRT is described in Appendix B. The new engineering record is described in Appendix B. This record can be distinguished from other records by word 22 in the header.
MRT | Header Contains | Word | Byte | ||||||||||||
MRID | SCID Spacecraft ID (1=VGR1, 0=VGR2) | 1 | 1 | ||||||||||||
MRMOD | SCDM Spacecraft data mode
|
1 | 2 | ||||||||||||
MRETH | SCETH Spacecraft event time hours | 2 | 3-4 | ||||||||||||
MRETS | SCETS Spacecraft event time seconds | 3 | 5-6 | ||||||||||||
MRETMS | SCETMS Spacecraft event time milliseconds | 4 | 7-8 | ||||||||||||
MRETYR | SCETYR Spacecraft event time year | 5 | 9-10 | ||||||||||||
MRFLAG | SCEF*16+FDSCFF | 6 | 11 | ||||||||||||
MRG18I | Group 18 ID | 6 | 12 | ||||||||||||
MRM216 | MOD216 line clock mod 216 counter (48 min) | 7 | 13-14 | ||||||||||||
MRM60 | MOD60 line clock mod 60 counter (48 sec) | 8 | 15-16 | ||||||||||||
MRLINE | LINEC line clock line count mod 1-800 (.06 sec) | 9 | 17-18 | ||||||||||||
MRS1 | S1 status word 1 | 10 | 19-20 | ||||||||||||
MRS2 | S2 status word 2 | 11 | 21-22 | ||||||||||||
MRS3 | S3 status word 3 | 12 | 23-24 | ||||||||||||
MRS4 | S4 status word 4 | 13 | 25-26 | ||||||||||||
MRS5 | S5 status word 5 | 14 | 27-28 | ||||||||||||
MRS6 | S6 status word 6 | 15 | 29-30 | ||||||||||||
MRMOT | Motor position | 16 | 31-32 | ||||||||||||
MRNMOV | Number of motor steps | 17 | 33-34 | ||||||||||||
MRLOGT | Logarithmic amplifier temperature in 128*deg C | 18 | 35-36 | ||||||||||||
MRLEMT | LEMPA Telescope temperature in 128*deg C | 19 | 37-38 | ||||||||||||
MRMSI | Basic accumulation interval in milliseconds except for Cruise 5A which is in .01 sec | 20 | 39-40 | ||||||||||||
MRQ | Quality of frame = number of good Groups | 21 | 41-42 | ||||||||||||
MRRT | Record type (1=MRT, 2=MPT, 4=SEDR, 10=ENG, 11=CAL) | 22 | 43-44 | ||||||||||||
MRVER | Version number | 23 | 45-46 | ||||||||||||
MRALT | Alternate mode (-1 = unknown, 0=LEPT, 1=LEMPA) | 24 | 47-48 | ||||||||||||
MRRAB | Redundancy A or B (-1 = unknown, 0=A, 1=B) | 25 | 49-50 | ||||||||||||
MRPRO | Processing status (0=S1P, 1=S2P) | 26 | 51-52 | ||||||||||||
MRMOR | Motor period in seconds with some special cases: -1=unknown, 0=not decoded,9000=Encounter Stow (VGR2 Jupiter enc),10000=Stowed or commanded to position,5, 6, 24, 48, 144, 192, 360 (6 min), 384 | 27 | 53-54 | ||||||||||||
MRS5S | Nine S5's for NEAR encounter only | 28-36 | 55-72 | ||||||||||||
Spare | 37-38 | 73-76 |
MRT | Data follows header in MRT record | Word (16 bits) |
---|---|---|
RS | Array of rates in floating point REAL*4 | |
765 for Near Encounter | 39-1568 | |
1294 for Far | 39-2626 | |
888 for Cruise 1-6 | 39-1814 | |
122 for Cruise 5A | 39-282 | |
QRS | Array of quality words for each rate above | |
Integer*2 dimensioned | ||
765 for Near Encounter | 1569-2333 | |
1294 for Far | 2627-3920 | |
888 for Cruise 1-6 | 1815-2702 | |
122 for Cruise 5A | 283-404 | |
PA | Array of PHA data logical*1 | |
Separate record for all modes except Cruise 5A | ||
PA(5,32) for Cruise 5A | 405-484 |
MPT | Header contains the same as MRT except for | Word | Byte |
---|---|---|---|
MPNSR | Number of supplemental records | 6 | 12 |
NPNMF | Number of minor frames per sum | 17 | 33-34 |
MPNPHA | Number of PHA's | 20 | 39-40 |
ENG/CAL | Contains the same as MRT except for | Word | Byte |
---|---|---|---|
ENFLGS | Flags in which bits number 7-0 contain 7-6 Engineering rate 00=10 bps, 01=40 bps, 10=1200 not handled, 11=7200 stored 1200 not handled | 6 | 11 |
ENEMF | Engineering minor frame ( 0-59) of MUX(1). If read from 100 deck, =0 from 200 deck. If <0 occurred in earlier record not available. To reconstruct time if rate is 10bps on 100 deck M216 from record header, M60=lemf (which may be negative) LC=1 | 6 | 12 |
ENLEMT | LEMPA Telescope temperature REAL*4 | 16-17 | 31-34 |
ENLOGT | Logarithmic amplified temperature REAL*4 | 18-19 | 35-38 |
ENRAB | Redundancy A or B | 20 | 39-40 |
ENTDN | Temperature DN | 21 | 41-42 |
MRRT | Record type 10=ENG, 11=CAL | 22 | 43-44 |
ENMUX | Array of readings each 1 byte | ||
24 multiplexed readings for ENG data | 23-46 | 45-92 | |
60 multiplexed calibration readings for CAL | 23-82 | 45-164 |
Next: Description of Cruise 5A Data Record
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Last modified 4/27/05, Tizby Hunt-Ward
tizby@ftecs.com
Original page by I. Robertson