US Defense Department will stop providing satellite weather data

Is that possible? I thought GPS works by just listening for signals from GPS satellites?

I’m now realizing I know hardly anything about GPS. Like it was made in the 50’s or something? Do we keep sending more GPS satellites into space? Or are there just the original handful?

The basics of it are it's a digital synchronized time signal sent out by a constellation of satellites. Devices listen for at least 3 separate streams of time signals and the. triangulation happens to get a position.

Irrc the satellite signals not encrypted or whatever were randomized to be inaccurate on purpose. This is mitigated these days by using stuff like cell towers - we know exactly where they are. they pick the same signals out and send out corrections to the randomized data which increases accuracy.