Novatel OM-20000041 用户手册
D
Logs summary
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
221
VLHB
Format:
Message ID = 34
Message byte count = 72
Table D-12
GPSCard Velocity Status
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
Seconds of week
8
double
seconds
16
4
Latency
8
double
metres per second
24
5
Age
8
double
seconds
32
6
Horizontal speed
8
double
metres per second
40
7
Track over ground (TOG)
8
double
degrees
48
8
Vertical speed
8
double
metres per second
56
9
Solution status
4
integer
64
10
Velocity status
4
integer
68
Value
Description
0
Velocity computed from differentially corrected carrier phase data
1
Velocity computed from differentially corrected Doppler data
2
Old velocity from differentially corrected phase or Doppler (higher latency)
3
Velocity from single point computations
4
Old velocity from single point computations (higher latency)
5
Invalid velocity
Higher values reserved for future use