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Field
float af2
float af1
float af0
long aode
float deltan
double m0
double e
double roota
long toe
float cic
float crc
float cis
float crs
float cuc
float cus
double omega0
double omega
double i0
float omegadot
float idot
short accuracy
short health
short fit
char prnnum
Command/Response Formats
Table 6.40: SNV (Ephemeris) Structure (continued)
Bytes
4
Clock correction (sec/sec
4
Clock correction (sec/sec).
4
Clock correction (sec).
4
Orbit data issue.
4
Mean anomaly correction (semicircles/sec).
8
Mean anomaly at reference time (semicircles).
8
Eccentricity.
8
Square root of semi-major axis (meters
4
Reference time for orbit (sec).
4
Harmonic correction term (radians).
4
Harmonic correction term (meters).
4
Harmonic correction term (radians).
4
Harmonic correction term (meters).
4
Harmonic correction term (radians).
4
Harmonic correction term (radians).
8
Longitude of ascending node (semicircles).
8
Argument of perigee (semicircles).
8
Inclination angle (semicircles).
4
Rate of right ascension (semicircles/sec).
4
Rate of inclination (semicircles/sec).
2
User range accuracy (URA), coded 0-15.
0 = 2 m
6 = 16 m
1 = 2.8 m
7 = 32 m
2 = 4 m
8 = 64 m
3 = 5.7 m
9 = 128 m
4 = 8 m
10 = 256 m
5 = 11.3 m
11 = 512 m
2
Satellite health.
2
Curve fit interval (0 or 1)
0=>interval = 4 hours
1=>interval = 6 hours
1
Satellite PRN number minus 1 (0 to 31)
Content
2
).
1/2
).
12 = 1024 m
13 = 2048 m
14 = 4096 m
15 = no prediction possible
127
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