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Fundamental TechnologiesVoyager LECP Pages |
(See also MRT Record Header for CR5A.)
INDEX | ITEM |
VARIABLE |
TYPE | DESCRIPTION |
---|---|---|---|---|
1 | 1 |
SCID |
I*1 | Spacecraft Identification - identifies
the spacecraft transmitting this data |
2 |
MODE |
I*1 | Contains the space telemetry mode |
|
2 | 3 |
SCETH |
I*2 | Spacecraft Event Time, Hour - number of hours since the beginning of the current year plus 24. For the one hour interval Jan 1, 0000-0059 UT, SCET=24. The Day of Year may be computed using DAY=(SCETH/24). |
3 | 4 |
SCETS |
I*2 | Spacecraft Event Time, Sec - is the number of seconds since the beginning of the current hour. |
4 | 5 |
SCETMS |
I*2 | Spacecraft Event Time, Milliseconds - is the number of milliseconds since the beginning of the current second. |
5 | 6 |
SCETY |
I*2 | Spacecraft Event Time, Year - contains the last two digits of the current year (i.e., 77, 78) |
6 | 7 |
G18ID |
I*1 | Group 18 Identification - contains the number of the LECP data group being readout at the end of the current LECP major frame. |
8 |
SCETF |
I*1 | Spacecraft Event Time Flag - indicates that the spacecraft clock has been corrected in some manner in the J.P.L. processing. Bit 0 indicates correction to the line count (0=none, 1=corrected), bit 1 the MOD60 counter and bit 2 the MOD216counter. |
|
7 | 9 |
MOD216 |
I*2 | Mod216 Spacecraft Clock Word - contains the spacecraft Mod216 word for the first minor frame of the current record. This word is incremented every 48 minutes on the overflow of the Mod60 counter. |
8 | 10 |
M60 |
I*2 | Mod60 Spacecraft Clock Word - contains the spacecraft Mod60 word for the first minor frame of the current record. It has a range of 0 to 59 and is incremented every 48 seconds at the overflow of the line counter. |
9 | 11 |
LC |
I*2 | Spacecraft Line Counter - contains the line count for the first minor frame in the current record. LC ranges from 1 to 80010 and is incremented every 0.06 seconds. |
10 | 12 |
S1 |
I*2 | LECP Status Word 1 , 10 bits, right justified |
11 | 13 |
S2 |
I*2 | LECP Status Word 2 , 10 bits, right justified |
12 | 14 |
S3 |
I*2 | LECP Status Word 3 , 10 bits, right justified |
13 | 15 |
S4 |
I*2 | LECP Status Word 4 , 10 bits, right justified |
14 | 16 |
S5 |
I*2 | LECP Status Word 5 , 10 bits, right justified |
15 | 17 |
S6 |
I*2 | LECP Status Word 6 , 10 bits, right justified |
16 | 18 |
MP |
I*2 | LECP Motor Position - contains the motor position at the end of the current record. Bit 0 is set if the status word indicates motor centering, it is zero otherwise. Bits 1-3 contain the motor position with 0-7 corresponding to sector 1 thru 8 respectively. MP=1 if motor position is unknown. |
17 | 19 |
NMS |
I*2 | Number of Motor Steps - indicates the number of motor steps within the current LECP Major Frame. Turn arounds in Sectors 8 and 1 or 2 are considered to be two steps. |
18 | 20 |
LATEMP |
I*2 | LECP Log. Amp. Temperature - contains the log. amp. temp. (oC x 128. LATEMP= -9999 if the temperature is unknown. |
19 | 21 |
TTEMP |
I*2 | LECP Telescope Temperature - contains the telescope temperature (oC) x 128. TTEMP= -9999 if the temperature is unknown. |
20 | 22 |
BAI |
I*2 | Basic Accumulation Interval - contains the number of milliseconds of accumulation times for the group 1 and 2 logics. |
21 | 23 |
NG |
I*2 | Number of Groups - indicates the number of rate groups included in the current major frame. |
22 | 24 |
MRT/MPT |
I*2 | Master Rate Tape/Master Pulse Tape -
indicates whether this record is a master rate or master pulse record. |
23 | 25 |
VN |
I*2 | Version Number - indicates the version of S1P used to process the current data. |
24 | 26 |
LEPT/LEMPA |
I*2 | Indicates data type in record. -1=Don't know 0=LEPT 1=LEMPA "Normal" NE Logics in G3, 5, 6, 7, 9, 15 |
25 | RED.A/B |
I*2 | Redundancy A or B logic flag. | |
26 | Proc. Stat. |
I*2 | Check SW4 for 50/50. If 50/50 then Item 26. 0=LEPT Norm F. E. 1=LEMPA Also check DQW 14-15=11 |
|
27 | Stepping |
I*2 | Motor stepping rate |
*originally Table B2
Next: LECP Status Words
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Last modified 5/4/05, Tizby Hunt-Ward
tizby@ftecs.com
Original page by I. Robertson