List three satellite orbits and describe their diff erences.
What will be an ideal response?
In a geosynchronous orbit, a satellite is observed in the same spot in the sky each day
when observed from the same location at the same time.
To an Earth-based observer, geostationary satellites appear to be fixed or stationary
relative to the Earth. The geostationary orbit is a special case of a geosynchronous orbit, in which the orbit is circular and the satellite passes directly over the equator. Geostationary orbits are useful for communications satellites. A circular orbit at about 250 miles above the Earth’s surface is called a LEO. Because of their low altitude, these satellites can complete an orbit in 90 minutes and are visible from within a radius of roughly 600 miles. The low altitude means the satellite’s position is changing quickly and each satellite has a relatively small footprint, requiring a large number of satellites to provide appropriate coverage. These satellites do have advantages, however; in that they are cheaper to launch and require less transmission power.
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How does the final systems check begin?
What will be an ideal response?
The temperature of a refrigerant at which liquid and vapor can co-exist, for a specific pressure, is known as the point of _____.
a. saturation b. condensation c. superheat d. latency
The digestive system of ruminants is best suited for rations high in:
A. forages and other high fiber roughages. B. concentrates (low fiber feeds)
A series loop hydronic system is not desirable for use in a large residence because ____.
A. all of the heated water will flow to all rooms B. some rooms will overheat before other rooms are warm C. they are extremely noisy D. both a and b