[FOSS-GPS] how to make a rover with limited satellite view find a reliable fix

[Tshepang Lekhonkhobe]

Suppose I have this configuration:

     pos1-posmode  =kinematic
     pos2-armode   =continuous
     ant2-postype  =rtcm
     inpstr1-type  =tcpcli
     inpstr2-type  =ntripcli
     inpstr1-path  =<tcpsvr url>
     inpstr2-path  =<userid>:<password>@<ntrip server url>/<mount point>
     inpstr1-format=ubx
     inpstr2-format=rtcm3

That is, input 1 is a rover that gets its data (ubx) via a tcp server 
(using str2str) and input 2 is ntrip server base station. This works 
pretty well if the rover has more LOS to GPS satellites. That's when 
it's hovering between 9 and 10 valid satellites. But when not the view 
is not so good (6-9 valid), it hardlly ever gets fixes that last.

Is there a way to make the antenna with poorer LOS have more and 
reliable fixes?