Discovery II
NAVIGATION SYSTEM
DESCRIPTION AND OPERATION
87-25
The Rec Stat/Pos Src element is used to check that the GPS system is functioning correctly. The Rec Stat window
displays one of the following:
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POS – The system has a current position fix. This indicates that the GPS system is working normally. The Pos
Src window indicates the type of position fix (2D or 3D) and the number of satellites being received.
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TRACK – The system is tracking a number of satellites. This indicates that the system is working normally but
does not yet have enough information to determine the position of the vehicle. Check that there is nothing
obstructing the GPS antenna's 'view' of the sky.
NOTE: When exposed to satellites for the first time, the GPS system can take up to 15 minutes to determine the
position of the vehicle.
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COMERR – There is a communication error between the GPS receiver and the navigation computer
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SEARCH – The system is searching for satellites. If this is displayed it may mean there is a failure in the GPS
system. First check that there is nothing obstructing the GPS antenna's 'view' of the sky. Check the connections
between the GPS antenna and the navigation computer.
GPS Status Menu
GPS Tracking Information
Selecting the GPS Tracking Information from the GPS functions menu displays the satellite being received on each
channel together with a signal level. The menu also displays the number of satellites that are currently being received
and the Almanac status.
M86 6072
GPS Status
Latitude
Longitude
Altitude
Date / Time (UTC)
G Speed Heading
Rec Stat / Pos Src
PDOP / HDOP / VDOP
< Return
200 m
22.03.98
12:08
0.0 m/s
000
POS
3D/6
52 11' 26'' N
361 28' 52'' W
2.2
1.6
2.7
Functions