Problem1) which of the following properties may a geosynchronis orbit satisfy? A

Question

Problem1) which of the following properties may a geosynchronis orbit satisfy?

A) The orbit may be north-south, with orbital period of one day.

B) the orbit must be west-east, over any latitude, with orbital period of one day.

C) the orbit must be west-east, over any latitude, moving the same speed as the earth's surface at that latitude.

D) the orbit must be west-east, over the equator, with orbital period of one day.

E) the orbit must be west-east, over the equator,moving the same speed as the earth's surface at that latitude.

Explanation / Answer

Definition:  is an orbit around the Earth with an orbital period of one sidereal day, intentionally matching the Earth's sidereal rotation period (approximately 23 hours 56 minutes and 4 seconds).

The synchronization of rotation and orbital period means that, for an observer on the surface of the Earth, an object in geosynchronous orbit returns to exactly the same position in the sky after a period of one sidereal day. Over the course of a day, the object's position in the sky traces out a path, typically in the form of an analemma, whose precise characteristics depend on the orbit's inclination and eccentricity.

A special case of geosynchronous orbit is the geostationary orbit, which is a circular geosynchronous orbit at zero inclination (that is, directly above the equator). A satellite in a geostationary orbit appears stationary, always at the same point in the sky, to ground observers. Popularly or loosely, the term "geosynchronous" may be used to mean geostationary. Specifically, geosynchronous Earth orbit (GEO) may be a synonym for geosynchronous equatorial orbit, or geostationary Earth orbit. Communications satellites are often given geostationary orbits, or close to geostationary, so that the satellite antennas that communicate with them do not have to move, but can be pointed permanently at the fixed location in the sky where the satellite appears.

Step 2.

ANSWER:

The correct option is E, the orbit must be west-east, over the equator,moving the same speed as the earth's surface at that latitude.

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