Discussion
A ................ is an equatorial orbit of satellite at approximately 36000 km altitude, which completes one orbit around the earth in the same time needed for earth to rotate about its axis.
Answer: B
The orbit described is the geostationary orbit.
A satellite in a circular orbit over the equator at about 36,000 km (35,786 km) altitude takes 24 hours (one sidereal day) to go round the Earth, the same time the Earth takes to rotate. It therefore stays fixed above one point on the equator, which suits communication and weather satellites such as India's INSAT series.
Sun-synchronous orbits are low, near-polar orbits used by remote sensing satellites, low Earth orbits are only a few hundred kilometres up, and an elliptical orbit is defined by its shape, not by matching the Earth's rotation.
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