Just started to use KiwiSDR, pretty awesome system! I was wondering how sensitive the GPS is on this design? In my experience so far, with the active antenna shipped by Seeed, it is not super sensitive compared to integrated modules, but at the same time, we are talking about a GPS for a static location where the actual fix is less important than the clock & frequency calibration :)
One thing I noticed, is that the patch antenna that is in the Seeed kit definitely benefits from being placed on a ground plane - sticking it to a large metal plate using its magnet makes a night and day difference!
Keep up the good work.