Trimble Juno 3B User Manual

76 Juno Series Handhelds User Guide
variety of public and commercial sources. They can be generated and broadcast in
real-time by privately or self-owned GNSS base stations, or by a wide range of
government agencies.
Real-time DGNSS corrections can be used on the Juno series handheld from Satellite
Based A
ugmentation Systems (SBAS) such as WAAS in the US and EGNOS in Europe.
SBAS uses multiple base stations to calculate the DGNSS corrections that are then
delivered to the user from a Geostationary satellite.
Factors that affect real-time DGNSS accuracy include how often the corrections are
upd
ated, how far you are from the base station, and whether the coordinate system
used by the correction source matches the coordinate system used by the GNSS
receiver.
Postprocessed DGNSS
In postprocessed DGNSS, the collected GNSS data is transferred to an office computer,
and
measurements from the base station are downloaded. You can postprocess GNSS
data collected with Trimble GNSS field software using:
• the GPS Pathfinder Office software
• the Trimble GPS Analyst
™
extension for Esri ArcGIS Desktop software
Factors that affect the accuracy of postprocessed DGNSS include the type of receiver
and a
ntenna 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
so
ftware.
Postprocessed real-time DGNSS
The accuracy of positions using the Juno series handheld is within one to three meters
p
ostprocessed, or two to five meters with real-time differential correction. The
accuracy of real-time SBAS corrected positions can be improved to one to three meters
with postprocessing.
If your data files contain autonomous (uncorrected) positions as well as real-time
cor
rected positions, Trimble recommends that you postprocess the data. During
postprocessing, you can choose whether to correct only autonomous positions, or all
positions.
Configuring NMEA output
You can use the Juno series handhelds integrated GNSS receiver with any GNSS field
s
oftware that accepts NMEA messages.

Trimble Juno 3B Specifications

General

Brand	Trimble
Model	Juno 3B
Category	Handhelds
Language	English