91. The lowest frequency used in satellite communication is
92. In radar propagation, attenuation in the clear atmosphere is seldom a serious problem at frequencies below
93. A scan type radar display can
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?
95. In Satellite antennas, the available noise from a thermal noise is given by
96. As per WARC-1979 allocation, commercial communication satellites use bandwidth of
97. A planet nine times far away from Sun as compared to earth, has an orbital period of
98. An artificial satellite can be tracked very precisely from the earth by using-
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
100. Tracking radar determines
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