GPS-RTK Hookup Guide
Nate 
Connecting an Antenna
U.FL connectors are very good but they are a designed to be implemented inside a small embedded application like a laptop. Exposing a U.FL connector to the wild risks it getting damaged. To prevent damaging the U.FL connection we recommend threading the U.FL cable through the stand-off hole, then attach the U.FL connectors. This will provide a great stress relief for the antenna connection. Now attach your SMA antenna of choice.
If you’re indoors you must run an SMA extension cable long enough to locate the antenna where it has a clear view of the sky. That means no trees, buildings, walls, vehicles, or concrete metally things between the antenna and the sky. Be sure to mount the antenna on a 4”/10cm metal ground plate to increase reception.
