Holux GM-83 User Manual
Page 10
GM-83 User’s manual
10
3
3D
4.1.4 GNSS Satellites in View (GSV)
Table 4-8 contains the values for 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 4-8 GSV Data Format
Name
Example
Units
Description
Message ID
$GPGSV
GSV protocol header
Number of Messages
(1)
2
Range 1 to 3
Message 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
End of message termination
(1). Depending on the number of satellites tracked multiple messages of GSV data may be required.
4.1.5 Recommended Minimum Specific GNSS Data (RMC)
Table 4-9 contains the values for the following example:
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10
Table 4-9 RMC Data Format
Name
Example
Units
Description
Message ID
$GPRMC
RMC protocol header
UTC Time
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
N
N=north or S=south
Longitude
12158.3416
dddmm.mmmm
E/W Indicator
W
E=east or W=west
Speed Over Ground
0.13
knots
Course Over Ground
309.62
degrees True
Date
120598
ddmmyy
Magnetic Variation
(1)
degrees E=east or W=west
Checksum
*10
End of message termination
(1). SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS84
directions.