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Satellite Page. Left view indicates unit has not locked on to any satel-
lites and does not have a fix on its position. Center view shows satel-
lites being scanned. Right view shows satellite lock-on with a 3D posi-
tion acquired (latitude, longitude and altitude.)
This screen shows a graphical view of the satellites that are in view. Each
satellite is shown on the circular chart relative to your position. The point in
the center of the chart is directly overhead. The small inner ring represents
45° above the horizon and the large ring represents the horizon. North is at
the top of the screen. You can use this to see which satellites are obstructed
by obstacles in your immediate area if the unit is facing north.
The GPS receiver is tracking satellites those satellites whose numbers ap-
pear in light blue on the circular chart. The receiver hasn't locked onto
a satellite if the number is dark blue, therefore it isn't being used to
solve the position.
Beneath the circular graph are the bar graphs, one for each satellite in
view. Since the unit has twelve channels, it can dedicate one channel
per visible satellite. The taller the bar on the graph, the better the unit
is receiving the signals from the satellite.
The "Estimated Position Error" (horizontal position error) shown in the
upper right corner of the screen is the expected error from a benchmark
location. In other words, if the EPE shows 50 feet, then the position
shown by the unit is estimated to be within 50 feet of the actual loca-
tion. This also gives you an indicator of the fix quality the unit cur-
rently has. The smaller the position error number, the better (and more
accurate) the fix is. If the position error flashes dashes, then the unit
hasn't locked onto the satellites, and the number shown isn't valid.
The Satellite Status Page has its own menu, which is used for setting
various options. (Options and setup are discussed in Sec. 9.) To access
the Satellite Status Page Menu, from the Status Page, press
MENU.