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Appendices
46 Test Bed Receiver Subsystem Addendum – Rev 1
Table 3 GLONASS Ephemeris Flags Coding
N 7 N 6 N 5 N 4 N 3 N 2 N 1 N 0 <- <- Nibble Number
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit Description Range Values Hex Value
lsb =
0 P1 FLAG - TIME INTERVAL BETWEEN ADJACENT iISSUE (t
b
) VALUES See Table below 00000001
1 00000002
2 P2 FLAG - ODDNESS OR EVENNESS OF iISSUE (t
b
) VALUE 0 = even, 1 = odd 00000004
3
P3 FLAG - NUMBER OF SATELLITES WITH ALMANAC INFORMATION WITHIN CURRENT
SUBFRAME 0 = five, 1 = four 00000008
4
: RESERVED
31
Table 3, Bits 0 - 1: P1 Flag Range Values
State Description
00 0 minutes
01 30 minutes
10 45 minutes
11 60 minutes