User's Manual

Table Of Contents

Using GPS

GeoExplorer 2005 Series Getting Started Guide 33

Postprocessed DGPS typically uses only one reference station,

however, when differentially correcting data collected with GeoXH

receivers using H-Star technology, you can select multiple reference

stations to correct the file against for improved accuracy.

Factors that affect the accuracy of postprocessed DGPS include the

distance between the reference station and the location where the

rover data was collected, the accuracy of the reference station

position, and the logging interval at the reference station.

For more information, refer to the documentation provided with your

postprocessing software.

Postprocessed real-time DGPS

Postprocessed DGPS positions are generally more accurate than

DGPS positions obtained in real time. If you collect SuperCorrect

records, or H-Star data with the ProXH receiver, as well as GPS

positions using the TerraSync software or the GPScorrect extension,

or using applications developed using the GPS Pathfinder Tools SDK,

you can postprocess your files in the GPS Pathfinder Office software

or the Trimble GPS Analyst extension to improve accuracy.

Note – For more information about GPS and DGPS, review the All About

GPS tutorial available from the Trimble website at