Fundamental Technologies

Voyager LECP Pages

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.

Next: Cruise 2

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Last modified 4/7/05, Tizby Hunt-Ward
tizby@ftecs.com