There been some discussion about antenna gain and coax loss but perhaps more important is can your antenna "see" the birds. In exploring different antenna types, I learned a few things:
- many people think GPS sats are geostationary which they are not (I never thought that BTW!)
- many people think that the constellation of sats in uniform around the Earth, it is not
- depending on where you live there may be few usable sats to your north or south, in my case the former.
- if your sat view is like mine or similar, avoid aiming into the "hole", see the graphic below from my kiwi
- you can preview your sat coverage on a cellphone using something like GPS Status (Android)
- there are sites that show the constellations such as https://in-the-sky.org/satmap_radar.php
