In order for the control electronics of the Sunchronizer to calculate the correct sun angle, it needs to know the exact time as well as the current position. 

For this purpose, I installed a GPS receiver on the Sunchronizer. I designed the housing shown so that the GPS antenna has a clear view of the sky and is protected from splash water/rain at the same time. 

The GPS module can be installed in it and then attached to the aluminum profiles of the Sunchronizer with the housing and two M5 screws. 

The STLs of the housing can be found on my blog at: https://nerdiy.de/produkt/neo7mv2-gps-empfaenger-modul-gehaeuse-3d-druckbar-stl-dateien/