RoyalTek ret-3570lp 用户手册
RoyalTek Confidential
16
RET-3570LP User Manual
M
Manual-forced to operate in 2D or 3D mode
A
Automatic-allowed to automatically switch 2D/3D
GSV-GNSS Satellites in View
Table 7 contains the values of the following example:
$GPGSV, 2, 1, 07, 07, 79, 048, 42, 02, 51, 062, 43, 26, 36, 256, 42, 27, 27, 138, 42*71$GPGSV, 2, 2,
07, 09, 23, 313, 42, 04, 19, 159, 41, 15, 12, 041, 42*41
Table 7 GGA Data Format
Name Example
Units
Description
Message ID
$GPGSV
GSV protocol header
Number of
Messages
1
2
Range 1 to 3
Messages Number
1
1
Range 1 to 3
Satellites in View
07
Satellite ID
07
Channel 1(Range 1 to 32)
Elevation 79
degrees Channel
1(Maximum
90)
Azimuth
048
degrees Channel 1(True, Range 0 to 359)
SNR (C/No)
42
dBHz Range 0 to 99, null when not tracking
….
….
Satellite ID
27
Channel 4(Range 1 to 32)
Elevation 27
degrees Channel
4(Maximum
90)
Azimuth
138
degrees Channel 4(True, Range 0 to 359)
SNR (C/No)
42
dBHz Range 0 to 99, null when not tracking
Checksum *71
＜
CR＞＜LF＞
End of message termination
1
Depending on the number of satellites tracked multiple messages of GSV data may be required.
RMC-Recommended Minimum Specific GNSS Data
Table 8 contains the values of the following example:
$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10
Table 8 GGA Data Format
Name Example
Units
Description
Message ID
$GPRMC
RMC protocol header
UTC Position
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid