Trimble Outdoors aggps 332 사용자 설명서

2          Overview

1 0     AgGPS 332 GPS Receiver User Guide

A transmitter in the base station sends the corrections through a radio 
link to the rover radio, which sends the corrections to the AgGPS 332 
receiver. The rover receiver uses RTK corrections from the base station 
to calculate its position to centimeter-level accuracy. As part of this 
process, the rover receiver must calculate an initialization. This takes a 
few seconds. While the receiver is initializing, an RTK Float solution is 
generated. Once initialized, an RTK Fixed solution is generated. It is the 
RTK Fixed solution that provides centimeter-level accuracy.

The parts per million (ppm) error is dependent on the distance 
(baseline length) between the base and rover receiver. For example, if 
the distance is 10 km, a 2 ppm error equals 20 mm.

For more information about RTK positioning, go to the Trimble website 
at 

.

For differential positioning, the AgGPS 332 receiver uses corrections 
from SBAS (WAAS/EGNOS)/OmniSTAR satellites and Radio Beacons.

These differential systems use special algorithms to provide differential 
corrections that allow the rover receiver to calculate its position more 
accurately.

WAAS/EGNOS corrections are free in North America and Europe.

For more information about WAAS, go to the Federal Aviation 
Administration website at 

.

For more information about EGNOS, go to the European Space Agency 
website at

 

.

Radio Beacon corrections are available free worldwide. For more 
information about the Coast Guard Beacon, go to 

.