Suggestion and comments on GPS please [resolved, see list of improvements]
Would be interested to hear how people have achieved a good reliable GPS fix. I have tried and failed on a number of occasions, and so far tried the following.
Mag mount antenna (with 26dB LNA) mounted outside on metal plate.
Moving the antenna as far away from the house as coax will allow
Changing the antenna for another similar mag mount
Cutting off the thin coax and replacing it with thicker lower loss double screen coax.
I still can't get a reliable fix, sometimes its shows tracking 6,7,8 SATS and good 1,2 or 3
The position of the SDR makes it very hard to position the antenna with a clear view of the sky, it has around 40% clear view and other areas are obstructed by the house, trees, fence.
On occasions, it runs for while, 3.6K fixes but then stops.
I have checked the voltage on the SMA, thinking it could be an issue but its fine 3.3v
So how do others get on, what exactly do you need to do to get a reliable fix?
enclosed image shows a typical screen, tracking
It's a little disheartening with TDoA as I really wanted to be part of the system, and located close to London. Could my KIWI be faulty, of do you really have to have an antenna with 90% clear views of the sky?