Reminder of Bartosz Ciechanowski "GPS" article:

* https://ciechanow.ski/gps/

* 2022: https://news.ycombinator.com/item?id=29981188

* 2023: https://news.ycombinator.com/item?id=36180316

* Others: https://news.ycombinator.com/from?site=ciechanow.ski

Standford's "An Introduction to Satellite Navigation" course is also instructive (recorded 2014):

* https://www.youtube.com/playlist?list=PLGvhNIiu1ubyEOJga50LJ...