Trimble Outdoors aggps 332 Manuale Utente

C NMEA-0183 Messages

8 2 AgGPS 332 GPS Receiver User Guide

C.3

NMEA Message Summary

Table C.3 describes the NMEA-0183 message set that is supported by
the AgGPS receivers.

Note –

Some messages are only supported when specific Trimble options

are installed on the receiver.

Messages beginning with PTNL are Trimble proprietary messages.

Table C.3

NMEA message summary

Message

Message Contents

GGA (GPS Fix Data)

Time, position, and fix related data

GLL (Position Data)

Position fix, time of position fix, and status

GRS (GPS Range
Residuals)

GPS range residuals

GSA (GPS DOP and Active
Satellites)

GPS position fix mode, SVs used for navigation and DOP values

GPS Pseudorange Noise (PRN) statistics

GSV (GPS Satellites in
View)

Number of SVs visible, PRN numbers, elevation, azimuth and SNR
values

MSS (Beacon Receiver
Signal Status)

Signal strength, signal-to-noise ratio, beacon frequency, and
beacon bit rate

RMC (Recommended
Minimum Specific GPS
Data)

UTC time, status, latitude, longitude, speed over ground (SOG),
date, and magnetic variation of the position fix

VTG (Course Over
Ground and Ground
Speed)

Actual track made good and speed over ground

XTE (Cross-Track Error)

Cross-track error

ZDA (Time and Date)

UTC time, day, month, and year, local zone number and local zone
minutes

PTNLDG Proprietary
(Trimble DGPS Receiver
Status)

Beacon channel strength, channel SNR, channel frequency, channel
bit rate, channel number, channel tracking status, RTCM source,
and channel performance indicator

PTNLEV Proprietary
(Event Marker)

Time, event number, and event line state for time-tagging change
of state on an event input line