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GPS signals from low attitudes improve accuracy (to a point) because they provide much better triangulation. You want low attitude GPS satellites. You also don'
by KennyBlanken 2y ago
GPS signals from low attitudes improve accuracy (to a point) because they provide much better triangulation. You want low attitude GPS satellites. You also don't want to lose signal every time the receiver tips, like when going up/down slight hills.
- Aloisius 2y agoThey don't lose signal when the receiver tips (which would make it useless for planes). They use antenna arrays to filter signals coming from directions they don't expect, too strong, etc. These systems have been used used in military aircraft for a long time.
- GJim 2y ago> triangulation *Trilateration One measures the time of flight of the satellites signal, not the angle it arrives from! https://en.wikipedia.org/wiki/Trilateration https://en.wikipedia.org/wiki/Trilateration