Minimum number of communication satellites required to cover the whole earth is______________?
Correct answer: B. 3
- A. 4
- B. 3
- C. 2
- D. 5
Explanation
Three properly placed geostationary communication satellites can provide continuous coverage of the Earth because each satellite covers roughly one-third of the equatorial region, with overlapping coverage. Thus the minimum commonly quoted number is 3 satellites. Students may choose 2 by assuming each satellite can cover one hemisphere, which does not provide complete practical coverage.
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