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E1E04

What is an earth station in the amateur-satellite service?

Select	Answer
A	An amateur station that is not able to communicate using amateur satellites
B	Any amateur station on the surface of the Earth
C	An amateur station within 50 km of the Earth's surface for communications with Amateur stations by means of objects in space
D	An amateur station that transmits telemetry consisting of measurement of upper atmosphere data from space

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