D Logs summary

MiLLennium Command Descriptions Manual 123

ALMB

ALMB FORMAT:

Message ID = 18 Message byte count = 120

IONB FORMAT:

Message ID = 16 Message byte count = 76

Field # Field Type Bytes Format Units Offset
1 Sync 3 0
(header) Checksum 1 3
Message ID 4 4
Message byte count 4 8
2Satellite PRN number 4 integer 12
3Eccentricity 8 double 16
4Almanac ref. time 8 double seconds 24
5Almanac ref. week 4 integer weeks 32
6Omegadot - rate of right ascension 8 double radians/second 36
7Right ascension 8 double radians 44
8Argument of perigee w 8 double radians 52
9Mean anomaly Mo 8 double radians 60
10 Clock aging parameter af0 8double seconds 68
11 Clock aging parameter af1 8double seconds/second 76
12 Corrected mean motion 8 double radians/second 84
13 Semi-major axis A 8 double metres 92
14 Angle of inclination 8 double radians 100
15 Sv health from subframe 4, discrete 4 integer 108
16 Sv health from subframe 5, discrete 4 integer 112
17 Sv health from almanac, discrete 4 integer 116
Field # Field Type Bytes Format Units Offset
1 Sync 3 char 0
(header) Checksum 1 char 3
Message ID 4 integer 4
Message byte count 4 integer 8
2Alpha constant term 8 double seconds 12
3Alpha 1st order term 8 double sec/semicircle 20
4Alpha 2nd order term 8 double sec/(semic.)228
5Alpha 3rd order term 8 double sec/(semic.)336
6Beta constant term 8 double seconds 44
7Beta 1st order term 8 double sec/semic 52
8Beta 2nd order term 8 double sec/(semic.)260
9Beta 3rd order term 8 double sec/(semic.)368