NMEA-0183 message: GSV

Satellite information

The GSV message string identifies the number of SVs in view, the PRN numbers, elevations, azimuths, and SNR values.

Example GSV message strings are:

$GPGSV,8,1,25,21,44,141,47,15,14,049,44,6,31,255,46,3,25,280,44*75

$GPGSV,8,2,25,18,61,057,48,22,68,320,52,27,34,268,47,24,32,076,45*76

$GPGSV,8,3,25,14,51,214,49,19,23,308,46*7E

$GPGSV,8,4,25,51,44,183,49,46,41,169,43,48,36,220,45*47

$GLGSV,8,5,25,82,49,219,52,76,22,051,41,83,37,316,51,67,57,010,51*6C

$GLGSV,8,6,25,77,24,108,44,81,10,181,46,78,1,152,34,66,18,060,45*50

$GLGSV,8,7,25,68,37,284,50*5C

$GBGSV,8,8,25,111,35,221,47,112,4,179,39,114,48,290,48*11

GSV message fields

Field	Meaning
0	Message ID
1	Total number of messages of this type in this cycle
2	Message number
3	Total number of SVs visible
4	SV PRN number
5	Elevation, in degrees, 90° maximum
6	Azimuth, degrees from True North, 000° through 359°
7	SNR, 00 through 99 dB (null when not tracking)
8–11	Information about second SV, same format as fields 4 through 7
12–15	Information about third SV, same format as fields 4 through 7
16–19	Information about fourth SV, same format as fields 4 through 7
20	The checksum data, always begins with *