alleryGlobal positioning satellites revolve in nearly circular orbits at approximately what height above the earth's surface?
AAbout 515 km
BAbout 20,200 km
CAbout 35,780 km
DAbout 180 km
Answer & Solution
Correct answer: B. About 20,200 km
1. The chapter notes some medium-earth-orbit satellites revolve in circular orbits around 20,200 km up.
2. It states that global positioning satellites revolve in such orbits.
3. 515 km (rule out) is the height of the COEP 'Swayam' satellite, not GPS satellites.
4. Hence GPS satellites orbit at about 20,200 km.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 10 "Space Missions", p.148_
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