On: The World Economy Runs on GPS. It Needs a Backup P...

[RyJones]

The SR71 had impressive AN computers. Here is where you might start [0] looking. I found some lessons online [1] that might help.

[0] https://timeandnavigation.si.edu/multimedia-asset/nortronics...

[1] https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...