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5     Using the GPS receiver

66     Juno Series User Guide

In postprocessed DGPS, the collected GPS data is transferred to an office computer, 
and measurements from the base station are downloaded. You can postprocess GPS 
data collected with Trimble GPS field software using:

•

the GPS Pathfinder Office software version 4.10  (with the latest updates) or 
later.

•

the Trimble GPS Analyst extension for ESRI ArcGIS software version 2.10 (with 
the latest updates) or later.

Factors that affect the accuracy of postprocessed DGPS include the type of receiver 
and antenna used at the base station, the distance between the base station and the 
location where the rover data was collected, the accuracy of the base station position, 
and the logging interval at the base station.

For more information, refer to the documentation provided with the postprocessing 
software.

The accuracy of positions using the Juno series handheld is within 2 to 5 meters, 
whether it is corrected in real-time or postprocessed. The accuracy cannot be 
improved beyond this by postprocessing real-time SBAS corrected positions. 

However, if your data files contain autonomous (uncorrected) positions as well as 
real-time corrected positions, Trimble recommends that you postprocess the data. 
During postprocessing, you can choose whether to correct only autonomous positions, 
or all positions. 

For more information about GPS and DGPS, go to 

www.trimble.com/gps 

and review 

the All About GPS tutorial.

You can use the Juno series handheld’s integrated GPS receiver with any GPS field 
software that accepts NMEA messages.

If you connect to the GPS receiver using Trimble GPS field software, by default the 
NMEA output is switched off.