[gpsd-users] xgps

[nick]

Is there a description anywhere of what the satellite plot circles mean 
in xgps?  Google doesn't seem much help.

I see grey circles, green circles, green filled circles, yellow circles, 
red circles etc.

I know my Jupiter-T doesn't give an accurate time sync unless there are 
at least 4 green filled circles, but that's all I know.

Nick