WESROC© RMS Satellite Repeater – User Manual
Metrotel Corporation of Minnesota, Inc.
Revision A. May 7, 2008
Page 11
Satellite Repeater GPS Detail Screen
Screen four displays current location information as received from the GPS
receiver in the Satellite Repeater. The Satellite Repeater will not transmit any
Satellite packets to the Globalstar® Simplex Data Network until it has obtained a
good location fix. The reason for this is that the Satellite Repeater must know
where it is so that it can determine the proper Globalstar® simplex channel to
transmit on for the purpose of respecting Radio Astronomy Sites and to adhere to
Globalstar®’s overall frequency plan.
Screen four shows:
1. Current Location Latitude in Degrees and Decimal Minutes (North or
South).
2. Current Location Longitude in Degrees and Decimal Minutes (East or
West).
3. Whether GPS has a good fix. The location information is not valid until
this field shows “Good” otherwise it will show “Bad” until it has received
a good location fix.
4. Number of satellites being tracked. The GPS receiver is based on the
Sirf-III chipset. It is capable of tracking 20 satellites at any given time.
The number shown is the number of GPS satellites current being
tracked.
5. The greatest Signal to Noise Ratio of the tracked satellites. Under
good conditions with a clear view of the sky, it is appropriate to expect
a maximum signal to noise ratio of 35 to 40.
To view the next screen, press the down button.
