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by staplung
470 days ago
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Technically, satellite positioning only needs 1 satellite. GPS requires several but one of its forerunners was Transit[1] which I believe only needed a signal from a single satellite at a time. It worked by measuring the doppler shift of the signal coming from the satellite. Of course that only works if the orbit can eventually cover all (or much of) the surface and for all I know there is no such frozen orbit for the moon. Also, it would still presumably require extensive surface-based tracking and correction. [1] https://en.wikipedia.org/wiki/Transit_(satellite) |
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