Re: kit GPS QLG1 #gps
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thank you everyone for the suggestion gpsd and xgps / cgps. I have been so fixated on my current use of uCenter that I almost completely forgot about xgps and cgps.
I am quite familiar with these tools and the gpsd daemon as I have used them before. xgps is a good alternative to visualGPS on Linux but uBlox uCenter has a feature which these do not and that is the ability to create a sky view display (see attached as an example) which is a 2D representation which shows average SNR of the received signals over azimuth and elevation. I have found this very useful for testing GNSS antennas as it shows how well your antenna is working.
xgps does produce a sky view but I don't think it is accumulative as the one in uCenter.
cheers, Graham ve3gtc