Q. The most effective anti jamming technique is

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Q. For satellite communication, standard Earth stations have antenna diameters in the range of __________ metre.

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Q. In a stop-and-wait ARQ system, the transmitting terminal

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Q. A geostationary satellite is one which

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Q. The geostationary communication satellite APPLE is parked in the equatorial orbit at

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Q. Power received from Sun per m² surface area of a geosynchronous satellite in nearly __________ watt.

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Q. A certain sound has 10000 times more energy than another sound. The number of times it would sound stronger to a listener is

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Q. For global communication, the number of satellites needed is

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Q. The discussing sharing of a communication satellite by many geographically dispersed Earth station, DAMA means

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Q. The angle subtended by earth at geostationary communication satellite is

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Q. The INTELSAT-IV satellite launched in 1974 had two earth coverage antenna and two narrower-angle antennas subtending 4.5°. The signal from narrow-angle antenna was stronger than that from earth- coverage antenna by a factor of

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Q. A transponder is a satellite equipment which

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Q. A geosynchronous satellite

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Q. The first geostationary satellite launched in 1965 was called

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Q. Rotation of a geosynchronous satellite means its

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Q. The present total cost per watt of power generation in geosynchronous orbit is nearly Rs.

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Q. Noise temperature of Sun is more than __________ °K.

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Q. A 20 m antenna gives a certain uplink gain at frequencies of 4/6 GHz. For getting same gain in the 20/30 GHz band, antenna size required is metre.

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Q. To make antenna more directional, either its size must be increased or

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Q. India's first domestic geostationary satellite 1NSAT-IA was launched on 10th April 1982 from

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