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Service (EGNOS) satellites are tracked in Europe.
MTSAT Satellite-based Augmentation System
(MSAS) satellites are tracked in Japan.
If you have selected satellites that are not
available at your location, you cannot use SBAS
corrections.
Problem
Cause
Solution
The handheld is not
receiving real-time
corrections from the
external real-time
correction source
The external source is
incorrectly connected to
the real-time COM port.
In the Real-time Settings section of the GNSS field
software, select the COM port that the real-time
source is connected to.
The port settings are
incorrect.
Change the port settings to match those used by
the external source.
No GNSS positions are
available.
You cannot use real-time corrections until the
GNSS receiver is computing positions. In the
GNSS field software, make sure that the
integrated GNSS receiver is activated, enough
satellites are available, and that the satellite
geometry (PDOP) is good enough to compute
positions.
6.9.Recommended GNSS settings for
maximum precision and productivity
The following table lists some of the factors that affect the precision of your data, and
describes how to minimize the effect of atmospheric interference and poor satellite
geometry.
Factor
Description
To maximize precision and productivity
Satellite shadow
Satellite shadow is when the line
of sight between the GNSS
receiver and satellites is partially
or fully blocked by obstructions
such as buildings, trees, or land
masses. The effect of satellite
shadow is a reduction in the
number of satellites that the
receiver is able to track. In
general, the quality of your data
increases with the number of
satellites being used to calculate
the position.
Tracking more satellites can help to improve
satellite geometry and thereby improve
accuracy.
Ensure the integrated GNSS receiver gets a
clear view of the sky as possible. Keep your
body mass as far from the receiver as
practical and do not crowd over the
handheld.
Use an external antenna if needed to elevate
the position of the antenna.
