Leica Geosystems GPS System 500 - Getting Started with Static and Kinematic Surveys - Manual (Page 14)

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Static and Kinematic Surveys-2.0.0en
Taking Static / Rapid-Static measurements
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Step 2: Study the icons, continued
If the "number of satellites used"
differs from the "number of visible
satellites" make sure you place the
antenna in an open area without
obstructions, since any obstacle will
block the view of satellites.
When you switch on the unit for the
very first time it might take a maxi-
mum of 5 minutes until all satellites
are tracked. This can happen in case
your current location differs
significantly (i.e. > 1000 km) from the
initial position which is the position
where your sensor has been used
before. Once you are tracking
satellites, the position memory in the
sensor will be updated.
The battery status icon at the right
side of the icon line shows from
which source the sensor is currently
powered. A and B indicate the
internal batteries, E an external
battery source. The symbol also
indicates the voltage level of the
currently used battery in 4 different
stages from "full" (fully black) to 2/3
to 1/3 and "almost flat" (white color).
The memory status icon gives
several information: whether memory
for logging data is available or not.
Options are either a PC-card or
internal memory. If a PC card is
available and configured for use then
at this stage an arrow indicates the
fact that it is safe to remove the PC-
card from the sensor. The little bar on
the right side indicates the available
memory on either the PC-card or the
internal memory.
Warning
You cannot proceed from
here if no memory device is
avail-able. Insert a PC-card
other-wise no GPS survey
can be carried out.
All status symbols which are relevant
for static and kinematic measure-
ments are listed in the appendix.
Once a minimum of 3 satellites is
tracked the sensor can start
computing a position. As soon as a
position is available it will be
indicated by an icon on the far left of
the status line. Since for post-
processing surveys no realtime link
will be used, the icon will always
indicate the availability of an
autonomous position ("navigated
position") with an accuracy of about
100 meters.
As soon as the position icon
becomes visible the sensor is in a
stage where practical operation can
commence.
If the position icon does not become
visible even after one or two minutes
then the sensor is still not tracking
satellites. If the "number of satellites
used" is still zero please check
whether the antenna cable is
connected properly to both sensor
and antenna.