Voyager LECP

VOYAGER

Voyager LECP Data Analysis Handbook

Data File Descriptions

Experiment Data Record (EDR) Format Specification

Cruise 1

(From Document 618-306, Revision D)

The LECP EDR science record is designed to a 48-second instrument measurement period. Any data not present during the instrument measurement will be filled with binary zeroes.

A logical record corresponds to an instrument measurement period and in this instance is also the science physical record structure.

The science logical/physical record structure is diagrammed in Figure 4.3-1.

Figure 4.3-1. LECP EDR Tape Record (Science)

Standard Header
(60 32-bit Words)

Subheader
(8 32-bit Words)

Science Data
(600 32-bit Words)

= 80 MF
(668 32-bit Words)
CR1

Figure 4.3-3 and Table 4.3-1 describe the structure and contents of the LECP science record subheader.

Figure 4.3-3. LECP Science Record Subheader Format for CR-1

Word	Bit 31	16 0	31	16 0
1	LECP Conf. CMD MF 9	Spare	LECP CMD Wrd MF 7	LECP CMD Wrd MF 17
3	LECP CMD Wrd MF 27	LECP CMD Wrd MF 37	LECP CMD Wrd MF 47	LECP CMD Wrd MF 57
5	LECP CMD Wrd MF 67	LECP CMD Wrd MF 77	Spare
7	Spare		Spare

Table 4.3-1. LECP Science Record Subheader Block (CR-1)

Item	Word	Bits	Description
1	1	31-16	LECP Confi. CMD	MF 9
2	1	15-0	Spare
3	2	31-16	LECP CMD Wrd	MF 7
4	2	15-0	LECP CMD Wrd	MF17
5	3	31-16	LECP CMD Wrd	MF 27
6	3	15-0	LECP CMD Wrd	MF 37
7	4	31-16	LECP CMD Wrd	MF 47
8	4	15-0	LECP CMD Wrd	MF 57
9	5	31-16	LECP CMD Wrd	MF 67
10	5	15-0	LECP CMD Wrd	MF 77
11	6	31-0	Spare
12	7	31-0	Spare
13	8	31-0	Spare

Figure 4.3-4 defines the science data word.

Figure 4.3-4. LECP Science Data Word (CR-1)

Spare						LECP Science Data Word
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0

Figure 4.3-5 and Table 4.3-2 define the science record data block structure and contents. Figure 4.3-6 defines the LECP data arrangement.

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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