PIXHAWK and GPS relationship and location impact

A student who is making a drone based on PIXHAWK.
Distance between GPS and FC China Maybe there are other manuals?
The reason for asking is that the distance between GPS and FC is too close, or SATCOUNT is too low (distance is about 5CM).
When I tried using shielding.tape, it seems that satcount is a little better and the distance to fc is increased a little.