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Satellite Page
The GPSMAP 230 Satellite Page provides a visual reference of various receiver
functions, including current satellite coverage, receiver operating mode and cur-
rent receiver accuracy. The status information will give you an idea of what the
receiver is doing at any given moment.
The sky view and signal strength bars give you an indication of what satel-
lites are visible to the receiver and whether or not they are being tracked. The sig-
nal strength is shown on a bar graph for each satellite, with the satellite number
below. When a satellite is visible but not being tracked, the strength bar will not
be shown and the sky view indicator will not be highlighted.
The sky view shows a bird’s-eye view of the position of each satellite relative
to the receiver’s last known position. The outer circle represents the horizon (track
up), the inner circle is 45º above the horizon, and the center point is a position
directly overhead. Use the sky view to determine if there are obstructions shading
your reception of GPS signals.
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SECTION
1
SATELLITE PAGE
Overview
A. Whenever the GPSMAP 230 is searching for satel-
lites, no signal strength bars will appear.
B. Once the receiver has found the satellite(s) indicated,
a hollow signal strength bar will appear. After satel-
lite data has been collected, the signal strength bars
will become solid.
Status Field
Horizontal Accuracy
Satellite
Sky View
Signal Strength
Indicators
Status Bar
Dilution of Precision
update on 230.qxd 1/12/00 11:22 AM Page 17