Originally Posted by
Iride01
Also realize the satellites are not geosynchronous. So at different times of the year there may or may not be enough at an optimal position to give you a reliable fix in your terrain and surrounding structures.
What?
https://link.springer.com/chapter/10...-642-72011-6_2
Thanks to this particular revolution period essentially the same satellite configuration is observed at a given point on the surface of the Earth at the same time of the day on consecutive days (the constellation repeats itself almost perfectly after 23h56mUT).