Clearly it doesn't need to be at 902-928 Mhz.
[Edit/Brainstorming]
I suggest we implement a 0.1% (time) tax on digital RF transmissions of all types, I.E. every second UTC, all Fixed Position transmitters send a 1 millisecond "National Positioning System" packet, with position and delay data with precision timing on all packetized systems using the public airwaves. We could use same system to distribute time signals.
This allows implementation of a new public service with minimal cost to all concerned, and we don't have to steal anyone's bandwidth from other services.
What NextNav did include however is its intent to resell their exclusive bandwidth access to mobile 5G networks.
They admit nobody is calling for ground based GPS. And that can be done in lots of ways and on spectrum already allocated as the EFF says in their piece.
Fact is 5G sucks for some use cases, like indoors. And they could fall back to 4G and or do other things to improve on that.
Trying to mooch the 900Mhz spectrum away from an active public use, just to resell their shiny new resource to 5G companies looking for easy options is not in the beat public interest.
I think they are doing it this way to avoid ugly PR for already disliked wireless companies. But I could be wrong...
900Mhz is excellent and widely used too. Augmenting 5G would make whoever stole it from all of us a lot of money.
The great propagation properties are exactly why public use of 900Mhz is popular!
I say the 5G companies already have 2G, 3G, 4G and 5G spectrum and the lower frequency ones propagate better in diverse terrain anyway.
All this means 5G companies have options and there is no need to allow one company to own what is now a public resource serving the public well just as it is supposed to.