Fundamental Technologies

Voyager LECP Pages

Appendix B (continued)

Table B-4, PHA Data Point
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 Voyager LECP Data Analysis Handbook Table of Contents.
Return to Fundamental Technologies Home Page.

Last modified 5/4/05, Tizby Hunt-Ward
tizby@ftecs.com
Original page by I. Robertson