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GSV – GPS Satellites in View

Figure 13 contains the values for the following example:

$GPGSV,3,1,12,28,81,285,42,24,67,302,46,31,54,354,,20,51,077,46*73

$GPGSV,3,2,12,17,41,328,45,07,32,315,45,04,31,250,40,11,25,046,41*75

$GPGSV,3,3,12,08,22,214,38,27,08,190,16,19,05,092,33,23,04,127,*7B

Mode 1 Values

Value Description

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

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

Figure 13: GPS Satellites in View Example

GPS Satellites in View Example

Name Example Units Description

Message ID $GPGSV GSV protocol header

Total number of

messages

3 Range 1 to 3

Message number

1 Range 1 to 3

Satellites in view 12

Satellite ID 28 Channel 1 (Range 01 to 196)

Elevation 81 degrees Channel 1 (Range 00 to 90)

Azimuth 285 degrees Channel 1 (Range 000 to 359)

SNR (C/No) 42 dB-Hz

Channel 1 (Range 00 to 99, null when

not tracking)

Satellite ID 20 Channel 4 (Range 01 to 32)

Elevation 51 degrees Channel 4 (Range 00 to 90)

Azimuth 077 degrees Channel 4 (Range 00 to 359)

SNR (C/No) 46 dB-Hz

Channel 4 (Range 00 to 99, null when

not tracking.

Checksum *73

<CR> <LF> End of message termination

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

may be required.

Figure 12: Mode 1 Values

RMC – Recommended Minimum Speciﬁc GPS Data

Figure 14 contains the values for the following example:

$GPRMC,053740.000,A,2503.6319,N,12136.0099,E,2.69,79.65,100106,,,A*53

Recommended Minimum Speciﬁc GPS Data Example

Name Example Units Description

Message ID $GPRMC RMC protocol header

UTC Time 053740.000 hhmmss.sss

Status A A=data valid or V=data not valid

Latitude 2503.6319 ddmm.mmmm

N/S Indicator N N=north or S=south

Longitude 12136.0099 dddmm.mmmm

E/W Indicator E E=east or W=west

Speed over ground 2.69 knots TRUE

Course over ground 79.65 degrees

Date 100106 ddmmyy

Magnetic Variation degrees Not available, null ﬁeld

Variation Sense E=east or W=west (not shown)

Mode A

A=autonomous, D=DGPS, N= Data

not valid

Checksum *53

<CR> <LF> End of message termination

Figure 14: Recommended Minimum Speciﬁc GPS Data Example

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 18 19

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