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1-4 NMEA Reference Manual—December 2007

GSV—GNSS Satellites in View

Table 1-9 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

MSS—MSK Receiver Signal

Note – Fields marked in italic red apply only to NMEA version 2.3 (and later) in this

NMEA message description.

This message for GSW3 and GSWLT3 is empty because they do not support

BEACON.

Table 1-10 contains the values for the following example:

$GPMSS,55,27,318.0,100,1,*57

Table 1-7 Mode 1

Value Description

M Manual—forced to operate in 2D or 3D mode

A 2D Automatic—allowed to automatically switch 2D/3D

Table 1-8 Mode 2

Value Description

1 Fix not available

2 2D (<4 SVs used)

3 3D (>3 SVs used)

Table 1-9 GSV Data Format

Name Example Unit Description

Message ID $GPGSV GSV protocol header

Number of Messages

1. Depending on the number of satellites tracked, multiple messages of GSV data may be required.

2 Range 1 to 3

Message Number

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/N0) 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/N0) 42 dBHz Range 0 to 99, null when not tracking

Checksum *71

<CR> <LF> End of message termination

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 26 27

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