Is it an RTK base station? If so I'd love to know more about why you set one up.
It's functionally equivalent to an RTK base station (the configuration script I'm using is even called "RTKbase"[0]), but it's being used for researching GPS-based soil moisture retrieval[1]. Basically the GPS signal bounces off the ground and causes an interference pattern that changes based on the wetness of the soil.
There is actually a permanent survey grade GNSS reciever about 200 m away from the u-blox receiver. But the geography around it (too hilly) means it doesn't work for soil moisture retrieval.
[0] https://github.com/Stefal/rtkbase/ [1] https://gnssrefl.readthedocs.io/en/latest/pages/understand.h...
Thanks for the details! I had no idea that estimating soil moisture from the signal was a thing
A monte carlo simulation using historical conditions said it had a ~95% chance of no downtime over 3 winter months. A slightly larger battery would bring that up to 99%.
The Pi (3b+), GNSS reciever (u-blox ZED F9P), and Waveshare 7600G 4G modem average about 3.5W idle. The GNSS reciever is about 0.1 - 0.2 W of that. Wifi would be more energy efficient, I imagine.