The lovely problem of a complex problem
One of the great issues of any GPS system is you don't know exactly where anything is at any given time. You know were it was and you can predict where it is going to be but its only a very good guess. The satellites are being tracked but there is a delay between signal tracking them and getting the info into a computer half a continent away. The weather is going to delay signals in odd ways that usually allows compensation using different frequencies but only some times. The clocks are ticking away with some very high degree of accuracy yet subject to all the oddness that relativity in a gravity well has to offer. The ground stations are busy floating on land that is cruising in different directions at a few cm a year which was considered slow and stable until better GPS systems showed drift rate can vary over the months yet maintain a rock solid annual average. Yet in all that chaos, my phone still can display a map of where it is down to a few meters. I guess this problem demonstrated just how related the chaos of all guesses can be.
Biting the hand that feeds IT
