Satellite Communication Questions

• The quality of a space-link is measured in terms of the __________ ratio.
• A geosynchronous satellite
• The useful operational life of INSAT-IB (launched in 1983) is expected to end by
• For global communication, the number of satellites needed is
• A certain sound has 10000 times more energy than another sound. The number of times it would sound stronger to a listener is
• A communication satellite is a repeater between
• Satellite launch sites are invariably located on Eastern seaboards to ensure that
• To make antenna more directional, either its size must be increased or
• Which of the following factor does NOT contribute to the drift of a geostationary satellite from its stationary position in space?
• Which one of the following statements regarding DSI is wrong?
• The discussing sharing of a communication satellite by many geographically dispersed Earth station, DAMA means
• Orbital disturbances of a geosynchronous satellite are caused by the
• For satellite communication, standard Earth stations have antenna diameters in the range of __________ metre.
• 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.
• The owner of a communication satellite is usually required to keep the spacecraft on station at its assigned place in the geosynchronous orbit with an accuracy of __________ degree.
• The most effective anti jamming technique is
• The number of days when Earth's shadow falls on a geosynchronous satellite is
• Noise temperature of Sun is more than __________ °K.
• In the case of a 70-MHz IF carrier for a transponder bandwidth of 36 MHz, energy must lie between MHz.
• As compared to 17.34° antenna, the total increase in the signal relayed by 4.5° antenna of INTELSAT-IV is