DS031-2 Jan ‘04

©2003 RF Solutions Ltd, www.rfsolutions.co.uk

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GPSM001

OEM GPS Receiver Module

GSV—GNSS Satellites in View

Description: This message reports the satellites in view, their ID numbers, elevation, azimuth, and SNR values (up to

four satellites per message). GSV is described in Table 8.

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

<CR><LF>

End of message termination

Table 8. GGA Data Format

Example: The values reported in this example are interpreted as shown in Table 8. Two messages are require to

complete the data transmission.

$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

RMC—Recommended Minimum Specific GNSS Data

Description: This message reports the time, date, position, course, and speed from the receiver’s navigation solution.

RMC is described in Table 9.

Name

Example

Units

Description

Message ID

$GPRMC

RMC protocol header

UTC Position

161229.487

Hh mm ss.sss

Status

A

A = data valid or V = data not valid

Latitude

3723.2475

Dd mm.mmmm

N/S Indicator

N

N = north or S = south

Longitude

12158.3416

Ddd mm.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

Dd mm yy

Magnetic Variation

1

degrees

E = east or W = west

Checksum

*10

<CR><LF>

End of message termination

Table 9. RMC Data Format

Example: The values reported in this example are interpreted as shown in Table 9:

$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,

309.62,120598, ,*10