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91
The lowest frequency used in satellite communication is
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Answer: Option B
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92
In radar propagation, attenuation in the clear atmosphere is seldom a serious problem at frequencies below
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Answer: Option B
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93
A scan type radar display can
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Answer: Option A
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94
If it takes a transmitted signal 1 m sec to go up to the target and come back after reflection, how far is the transmitter from the target?
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Answer: Option A
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95
In Satellite antennas, the available noise from a thermal noise is given by
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Answer: Option C
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96
As per WARC-1979 allocation, commercial communication satellites use bandwidth of
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Answer: Option D
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97
A planet nine times far away from Sun as compared to earth, has an orbital period of
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Answer: Option B
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98
An artificial satellite can be tracked very precisely from the earth by using-
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Answer: Option C
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99
A satellite orbiting in 600 km orbit transmits 5 GHz frequency. The Doppler shift observed at the ground station, when the satellite is over head of the station is
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Answer: Option B
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100
Tracking radar determines
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Answer: Option D
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