UINET servers often require UTC time. Ensure your GPS has a 3D fix. If using internal RTC, sync it with the GPS time using $GPZDA sentences.
Below is a scannable guide to get your system up and running. 1. Hardware Preparation gpsuinet setup
The following essay explores the technical foundations, configuration process, and operational benefits of the GPSUINET setup within high-performance network infrastructures. The Evolution and Implementation of GPSUINET Architectures UINET servers often require UTC time