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12

GPS Firmware 

- 

Standard SiRF firmware for SSIII (GSW3 & SiRFLoc 3) 

- Upload 

firmware 

- 

RGM-3550LP [GSW3][SBAS GGA(1), GSA(1), GSV(1), 

RMC(1) 9600 GPS Firmware, version 2.1.0.123 (default) 

GPS Utility 

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A GPS performance diagnostic utility is required   

- C/NO, 

TTFF 

WAAS 

- Enable 

GPS status 

- 

See GPS status light indicating specification 

Its output signal level is TTL: 9600bps (default), 8 bit data, 1 stop bit and no parity. It supports 

the following NMEA-0183   

Messages: GGA, GLL, GSA, GSV, RMC and VTG. 

NMEA Output Messages: the Engine board outputs the following messages as shown in Table 

1:  

Table 1 NMEA-0183 Output Messages 

GGA 

Global positioning system fixed data 

GLL 

Geographic position – latitude / longitude 

GSA 

GNSS DOP and active satellites 

GSV 

GNSS satellites in view 

RMC 

Recommended minimum specific GNSS data 

VTG 

Course over ground and ground speed 

 

GGA-Global Positioning System Fixed Data 

Table 2 contains the values of the following example: 

$GPGGA, 161229.487, 3723.2475, N, 12158.3416, W, 1, 07, 1.0, 9.0, M, , , ,0000*18