Novatel OM-20000041 用户手册
D
Logs summary
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
217
SVDB
Format:
Message ID = 36
Message byte count = 36 +(obs*68)
Field #
Data
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
2
Week number
4
integer
weeks
12
3
Time in seconds
8
double
seconds
16
4
Receiver clock error
8
double
metres
24
5
Number of observations to follow (obs)
4
integer
32
6
Satellite PRN number
4
integer
36
7
x coordinate of satellite
8
double
metres
40
8
y coordinate of satellite
8
double
metres
48
9
z coordinate of satellite
8
double
metres
56
10
Satellite clock correction
8
double
metres
64
11
Ionospheric correction
8
double
metres
72
12
Tropospheric correction
8
double
metres
80
13
Decoded differential correction used
8
double
metres
88
14
Range weight standard deviation
8
double
metres
96
15...
Next PRN offset = 36 + (obs*68) where obs varies from 0 to (obs-1)