Trimble Outdoors SPSX51 Manuel D’Utilisation

SPSx51 Modular GPS Receivers User Guide     

GSOF Messages     

This message describes the base station position and its quality. It is used when the 
moving base antenna position and quality are required on one serial port (along with a 
heading message) from a receiver in heading mode, typically the SPS551H.

Table B.16

Base position and quality indicator (Type 41 record)

0

Output record type

Char

01h

Position time output record

1

Record length

Char

0Ah

Bytes in record

2–5

GPS time (ms)

Long

msecs

GPS time, in milliseconds of GPS week

6–7

GPS week number

Short

number

GPS week count since January 1980

8

Latitude

Double

Radians

The WGS-84 latitude, in radians, of the 
moving base antenna

9

Longitude

Double

Radians

The WGS-84 longitude, in radians, of the 
moving base antenna

10

Height

Double

Meters

The WGS-84 height, in meters, of the moving 
base antenna

11

Quality indicator

Char

See 

The quality of the base station position:

0: Fix not available or invalid

1: Autonomous GPS fix

2: Differential SBAS or OmniSTAR VBS

4: RTK Fixed

5: OmniSTAR XP, OmniSTAR HP, Float RTK, 

or Location RTK