In satellite communications, the quality or degree of visibility of a satellite to a ground station[?]; i.e., the degree to which the satellite is sufficiently above the horizon and clear of obstructions so that it is within a clear line of sight by an Earth terminal[?].
Note: A pair of satellite Earth terminals has a satellite in mutual view when both have unobstructed line-of-sight contact with the satellite simultaneously.
Source: from Federal Standard 1037C and from MIL-STD-188
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