1. A satellite in geosynchronous orbit takes ____________________ hours to compl
ID: 1768546 • Letter: 1
Question
1. A satellite in geosynchronous orbit takes ____________________ hours to complete one orbit.
2. The ____________________ is the signal path from the earth station to the satellite.
3. The ____________________ is the signal path from the satellite to the earth station.
4. A satellite in a ____________________ orbit appears to stay directly above one spot on the equator.
5. All satellite orbits are ____________________ in shape.
6. The ____________________ is the distance of a satellite's closest approach to the earth.
7. The ____________________ is a satellite's farthest distance from the earth.
8. Satellites using the ____________________ band operate on 12 GHz.
9. In a frequency-hopping CDMA system, when no two transmitters use the same frequency at the same time the PN sequences are said to be ____________________.
10. In FDM, each signal uses part of the bandwidth ____________________ of the time.
11. In TDM, each signal uses all of the bandwidth ____________________ of the time.
12. Using CDMA on a radio channel, all signals can transmit ____________________ of the time.
Explanation / Answer
1. A geosynchronous satellite completes one orbit around the earth in the same time that it takes the earth to make one rotation in inertial (or fixed) space. This time period is known as one sidereal day and is equivalent to 23h56m04s of mean solar time.
2. Uplink is the signal path from the earth station to the satellite
3. Downlink is the signal path from the satellite to the earth station.
4. A satellite in a geosyncronous orbit appears to stay directly above one spot on the equator.
5. All satellite orbits are elliptical in shape.
6.The perigee is the distance of a satellite's closest approach to the earth.
7. The apogee is the distance of a satellite's greatest approach to the earth.
8. Satellites using the KU Band operate on 12GHz.
9. In a frequency-hopping CDMA system, when no two transmitters use the same frequency at the same
time the PN sequences are said to be orthogonal.
10. In FDM, each signal uses part of the bandwidth all of the time.
11. In TDM, each sognal uses part of the bandwidth part of the time.
12. Using CDMA on a radio channel, all signals can transmit all of the time
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