Q. APPLE was into orbit on 19 th June 1981 by European Space Agency (ESA) from

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Q. Mark out the WRONG statement.

As compared to FDMA, the demand assignment system TDMA

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Q. A satellite link uses different frequencies for receiving and transmitting in order to

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Q. Presently, the worlds's largest and most advanced multi-purpose communication satellite is

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Q. The 1150 kg geosynchronous satellite INSAT-IA parked 36000 km above India had greatly improved India's

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Q. The echo heard by a telephone user on a satellite channel can be removed by using

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Q. The degradation of satellite solar cells with time is mainly due to

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Q. Low-orbit satellites are not used for communications because they

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Q. The average noise temperature of Earth, as viewed from space, is __________ °K.

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Q. In satellite communication, highly directional antennas are used to

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Q. Geosynchronous communication satellites travel around the earth in circular orbits with a forward speed of about __________ km/h.

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Q. A typical error rate on satellite circuits is one bit error in

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Q. Most of the communication satellites are stationed to the West of their service areas in order to reduce their

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Q. India's Polar Satellite Launch vehicle (PSLV) to be ready in 1991 is designed to launch 1000 kg spacecraft into __________ orbit.

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Q. Phase modulation is commonly-used for data transmission mainly because

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Q. In selecting a satellite system, the First determining factor is its

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Q. Depending on the technique used, digitized television requires a bit rate between __________ millions.

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Q. A few minutes disturbance in space communications occurs twice a year during Sunblinding when __________ are in line.

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Q. Geosynchronous satellites are always launched in the equatorial plane because it is the only plane which provides

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Q. The lowest frequency used in satellite communications is __________ GHz.

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