Trimble Juno 3B User Manual

Juno Series Handhelds User Guide 75
Using SBAS corrections
The Juno series handheld has an integrated GNSS receiver that uses Satellite Based
Augmentation Systems (SBAS) correction messages to improve the accuracy and
integrity of GNSS data.
The SBAS tracking mode is Auto. In Auto mode, the receiver tracks or locks onto the
mo
st powerful satellite signal. The GNSS receiver can track two SBAS satellites at the
same time in Auto mode. It uses corrections from only one SBAS satellite at a time, but
tracking two satellites can improve the availability of SBAS real-time corrections. For
example, if you are working in environments where obstacles may block the direct line
of sight to the SBAS satellite, there is less chance of signal loss if you are tracking more
than one SBAS satellite.The receiver tracks SBAS satellites according to your
geographical location:
• Wide Area Augmentation System (WAAS) satellites are tracked in the
Continental United States including Alaska, and parts of Canada and Mexico.
• European Geostationary Navigation Overlay Service (EGNOS) satellites are
tracked in Europe.
• MTSAT Satellite-based Augmentation System (MSAS) satellites are tracked in
Japan.
Note – If you
have other Trimble GNSS field software installed, configure real-time
correction settings in that application instead of the GPS Controller software.
For further information, refer to the Trimbl
e field software documentation on
www.trimble.com:
• For the TerraSync software, go to
http://www.trimble.com/mappingGIS/Ter
raSync.aspx?dtID=technical_support
• For the GPS Controller software, go to
http://www.trimble.com/support_trl.asp?Nav=Collection-32054
Differential GNSS explained
Use differential GNSS to correct errors in your collected data. Differential GNSS
(DGNSS) requires one or more additional receivers, called base stations or reference
stations, which are located at known points. Data collected at the base stations is used
to determine GNSS measurement errors and compute corrections to these errors. An
unlimited number of mobile GNSS receivers, called rovers, collect GNSS data at
unknown locations within the vicinity of the base station. Errors common at both the
base station and the rover receiver are corrected with DGNSS either in real time or
during postprocessing.
Real-time DGNSS
In real-time DGNSS, the base station calcul
ates and broadcasts the error for each
satellite as each measurement is received, enabling you to apply corrections while in
the field and collect accurate GNSS data. DGNSS corrections are available from a

Trimble Juno 3B Specifications

General

Brand	Trimble
Model	Juno 3B
Category	Handhelds
Language	English