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Satellite Page
The Satellite Page displays the status of various
receiver functions. The status information will help you
understand what the GPS 125 Sounder is doing at any
given time, and tell you whether or not the receiver has
calculated a position fix.
Sky View and Signal Strength Bars
The sky view and signal strength bars give you an
indication of what satellites are visible to the receiver,
whether or not they are being used to calculate a posi-
tion fix, and the signal quality. The sky view in the cen-
ter of the page shows a bird’s-eye view of the position of
each satellite relative to the receiver’s last known posi-
tion. The outer circle represents the horizon (north up);
the inner circle is 45º above the horizon; and the center
point is a position directly overhead.
When the receiver is looking for a particular satel-
lite, the corresponding signal strength bar will be blank
and the sky view indicator will remain highlighted in
reverse video. Once the receiver has found the satellite,
a hollow signal strength bar will appear, indicating that
the satellite has been found and the receiver is collect-
ing data from it. The satellite number in the sky view
will also change from reverse video to normal presenta-
tion. As soon as the GPS 125 Sounder has collected the
necessary data to use the satellite for positioning, the
hollow bar will become solid.
Satellite Page
Overview
REFERENCE
18
When backlighting is on, a
bulb icon will appear on the
Satellite Page.
Use the icon to determine if
backlighting is turned on
during daylight hours.
Satellites being tracked but
blocked from use (03,17)
will be displayed in reverse
video, with the correspond-
ing signal strength bar
hollow.
Status
Satellite
Sky View
Satellite
Numbers
Estimated
Position Error
125 Man Rev B 7/23/98 11:47 AM Page 18