Voyager In Space

 

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VOYAGER

Voyager LECP Data Analysis Handbook

 

Data File Descriptions

 

Master Rate (Tape) File Descriptions

 

Appendix B (continued)

 

Description of LECP Data Quality Word Contents

 

BITS* VARIABLE DESCRIPTION
0-7 NBI Number of Basic Intervals-contains the number of basic accumulation intervals over which the corresponding rate is accumulated. The accumulation time in milliseconds is given by NBI*BAI. (See Tape Header Variables, formerly Table B2.)
8-10 MPB Motor Position-contains the motor position at the end of the accumulation interval. MPB ranges from 0 to 7, corresponding to the LECP sectors 1 thru 8 respectively. If MP or NMS (see Tape Header Variables, formerly Table B2) are less than zero then MPB is invalid.
11 MCF Motor Centered Flag-is set if the status word indicates that the motor was centered within the sector. It is zero otherwise.
12 MMF Motor Movement Flag-is set if a motor step occurred during the accumulation interval. It is zero otherwise.
13 DL Discriminator Level-is set if the LECP Beta detector is set to its high threshold state. It is reset otherwise.
14-15 SS Switch State-defines which of the b or b' and d or d' rates are accumulated.

 

00=not known; 01=b' - d detectors on; 10=b - d ' detectors on; 11=mixed 
Bit 0 is the Least Significant Bit. If all bits=0 then datum is missing.

 

Table B-5, PHA Data Point

 

BYTE CONTENTS
1 ID Identification plus some special codes 
376 octal if data was not present
377 if input ID byte was =0 and next byte was not
2 D1/D5
3 D2
4 D3
5 D4

 

Table B-6, Engineering Record on MRT File

 

INTEGER BYTE VARIABLE DESCRIPTION
1-5 1-10   Same as MRT Record Header Table B-2
6 11 ENFLGS Flags in which bits numbered 7-0 contain 
7-6 Engineering rate 00=10 bps, 01=40 bps,
10 = 1200 not handled,
11 = 7200 stored 1200 not handled
6 12 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 10 bps on 100 deck 
M216 from record header, M60=iemf (which may be negative) LC =1
7-15 13-30   Same as MRT Record Header Table B-2
16-17 31-34 ENLEMT LEMPA Telescope temperature REAL*4
18-19 35-38 ENLOGT Logarithmic amplifier temperature REAL*4
20 39-40 ENRAB Redundancy A or B
21 41-42 ENTDN Temperature DN
22 43-44 MRRT Record type 10=ENG, 11=CAL


23-46
23-82


45-92
45-164
ENMUX Array of readings each 1 byte
24 multiplexed readings for ENG data
60 multiplexed calibration readings for CAL

 

Return to MRT main page.

Return to Data File Descriptions main page. 

Return to Voyager LECP Data Analysis Handbook Table of Contents.
Return to Fundamental Technologies Home Page.


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.