Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

Due to perturbation of the orbit, satellite orbit parameters are frequ

1.	Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its
A.	six ground stations
B.	five ground stations
C.	four ground stations
D.	three ground stations
Answer» C. four ground stations

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Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

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