IBM G-Mouse GPS Receiver G-Mouse MR Manuale Utente

G-Mouse  GPS  Receiver User Manual 

Page 13 

$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 A-8 GSV Data Format 

Message ID 

$GPGSV   

GSV protocol header 

Number of 
Messages1 

2 

 

Range 1 to 3 

Message Number 1 1 

 

Range 1 to 3 

Satellites in View 

07 

 

Range 1 to 12 

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 

 

 

NOTE: Item <4>,<5>,<6> and <7> repeat for each satellite in view to a maximum of four (4) 

satellite per sentence. Additional satellites in view information must be sent in sentences. These 
fields will be null if unused. 

 

A.1.5 Recommended Minimum Specific GNSS Data (RMC) 

Samples: 
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10 
Table A-9 RMC Data Format 

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 Variation1 

02.6 

degrees  

E/W Indicator 

W 

 

E = east or W = west 

Checksum 

*10 

 

 

 

A.1.6 Course Over Ground and Ground Speed (VTG) 

Samples: 
$GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E 
Table A-10 VTG Data Format 

Message ID  

$GPVTG   

 

VTG protocol header