| |
Fundamental TechnologiesVoyager LECP Pages |
MRT Record Header (CR5A))
| Integer | Byte | Variable | Description |
|---|---|---|---|
| 1 | 1 | MRID | SCID Spacecraft ID 1=Voyager 1 0=Voyager 2 |
| 1 | 2 | MRMOD | SCDMSpacecraft telemetry mode 1-6 Cruise 2-7 7 Cruise 1 8 Near Encounter 10 (OAH) Far Encounter 24 (18H) Cruise 5A 19 (1DH) UV-5A |
| Spacecraft Event Time - contains the Greenwich Mean Time (GMT) of the first PN bit of the first minor frame (MF) used in this LECP major frame. |
|||
| 2 | 3-4 | MRETH | SCETH Spacecraft Event Time, Hour - Binary hours since the beginning of the current year. |
| 3 | 5-6 | MRETS | SCETS Spacecraft Event Time, Seconds- Binary seconds since the beginning of the current hour. |
| 4 | 7-8 | MRETMS | SCETMS Spacecraft Event Time, Binary - Binary milliseconds. |
| 5 | 9-10 | MRETYR | SCETYR Spacecraft Event Time, Year- Two least significant digits of year, e.g. 78 |
| 6 | 11 | MRFLAG | SCEF*16+FDSCFF where SCEF is Spacecraft Event Time Flag 0000 input by NORT file 1111 input by EDRPROC FDSCFF is FDSC Correction Flag which indicates that the FDSC has been corrected. (1=corrected, 0=OK) Bit 3 Spare Bit 2 MOD216 Bit 1 MOD60 Bit 0 Line Count |
| 6 | 12 | MRG181 | Group 18 ID |
| 7 | 13-14 | MRM216 | Mod2**16 counter from the Flight Data System (FDS). Increments each 48 minutes. |
| 8 | 15-16 | MRM60 | Mod60 counter from the FDS. Increments each 48 seconds |
| 9 | 17-18 | MRLINE | Line counter from the FDS. Increment every 60 ms. |
| 10 | 19-20 | MRS1 | S1 LECP Status Word 1, MSB=1 if missing. |
| 11 | 21-22 | MRS2 | S2 LECP Status Word 2, MSB=1 if missing |
| 12 | 23-24 | MRS3 | S3 LECP Status Word 3, MSB=1 if missing |
| 13 | 25-26 | MRS4 | S4 LECP Status Word 4, MSB=1 if missing |
| 14 | 27-28 | MRS5 | S5 LECP Status Word 5, MSB=1 if missing |
| 15 | 29-30 | MRS6 | S6 LECP Status Word 6, MSB=1 if missing |
| 16 | 31-32 | MRMOT | LECP Motor Position - contains the motor position at the end of the current record. = -1 if unknown, otherwise Bits 3-1 Motor position (0-7) for sector (1-8) Bit 0 Centered flag, =1 if centered. |
| 17 | 33-34 | MRNMOV | Number of motor steps. Turn arounds in sectors 8 and 1 or 2 are considered to be 2 steps. = -1 if unknown. |
| 18 | 35-36 | MRLOGT | Log. Amp. Temperature in Deg C*128. =-9999 if unknown |
| 19 | 37-38 | TTEMP | LECP Telescope Temperature-contains the telescope temperature (degrees C) x 128. TTEMP= -9999 if the temperature is unknown |
| 20 | 39-40 | MRMSI | Basic accumulation interval in .01 sec. |
| 21 | 41-42 | MRQ | Quality of frame = number of good groups |
| 22 | 43-44 | MRRT | Record type 1 MRT 2 MPT Header 4 SEDR 10 Eng 11 Cal |
| 23 | 45-46 | MRVER | Version number of S1P program used to process this data. |
| 24 | 47-48 | MRALT | LEPT/LEMPA - In GS-3 alternating mode this word indicates which logics are being read out in the current record: -1 = unknown 0 LEPT 1 LEMPA |
| 25 | 49-50 | MRRAB | Redundancy A/B - indicates which of the LECP redundant data systems is being used. -1 unknown 0 A 1 B |
| 26 | 51-52 | MRPRO | Processing status 0 S1P 1 S2P, motor corrections applied |
| 27 | 53-54 | MRMOR | Motor period in seconds with some special cases: -1 Not known 0 Not decoded 9000 Encounter Stow (Vgr 2 Jupiter enc) 10000 Stowed or commanded to position Values implemented in software include 5, 6, 24, 48, 144, 192, 360 (6 min), 384 |
| 28-36 | 55-72 | MRS5S | Nine S5's for Near Encounter only |
| 37-38 | 73-76 | Spare |
header.html last modified on 9/24/14 at 4:21 AM by sel