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The GNC 250’s satellite status page provides satellite information to monitor
GPS coverage and receiver performance. This is helpful when you may be experienc-
ing low signal levels due to poor coverage or installation problems.
To view the satellite status page:
1. Press
N
and rotate
O
until the satellite status page appears.
The top line of the status page displays the receiver status and the current posi-
tion accuracy in DOP or EPE. The default setting is DOP.
The following functions may be displayed in the DOP/EPE field:
• dop— Dilution of Precision, a measure of the satellite geometry quality
and relative accuracy of your position, with 1 meaning good
geometry and 10 meaning poor.
• epe— Estimated Position Error, an overall measure of your positional
accuracy in feet or meters using signal and data quality, receiver
tracking status and DOP.
16
REFERENCE
NAV Menu 1 & Trip
Planning
Status page with EPE displayed.
Status page with DOP displayed.
Receiver Status
Signal strength of
satellite being tracked (1-9)
EPE/DOP
Satellites in view
EPE/DOP
value
Satellite in view
but not receiving signal
SECTION
1
NAV KEY
Satellite
Status Page
250 real 7/14/98 9:32 AM Page 16