Globalsat ET-332 - Page 9

GSV-GNSS Satellites in View
Table B-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 B-8 GSV Data Format
Name
Example
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(Maximum90)
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(Maximum90)
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
Depending on the number of satellites tracked multiple messages of GSV data may be required.
RMC-Recommended Minimum Specific GNSS Data
Table B-10 contains the values for the following example:
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,*10
Table B-10 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
2
degrees
E=east or W=west
Checksum
*10
<CR><LF>
End of message termination
SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are
geodetic WGS48 directions.