1. The discussing sharing of a communication satellite by many geographically dispersed Earth station, DAMA means
2. The angle subtended by earth at geostationary communication satellite is
3. 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
4. A transponder is a satellite equipment which
5. A geosynchronous satellite
6. To make antenna more directional, either its size must be increased or
7. India's first domestic geostationary satellite 1NSAT-IA was launched on 10th April 1982 from
8. Satellite launch sites are invariably located on Eastern seaboards to ensure that
9. 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.
10. The number of days when Earth's shadow falls on a geosynchronous satellite is
11. Of the four INSAT-I satellites planned by India so for, only __________ has proved to be successful.
12. Radio broadcasting is a familiar example of
13. As compared to 17.34° antenna, the total increase in the signal relayed by 4.5° antenna of INTELSAT-IV is
14. Which one of the following statements regarding DSI is wrong?
15. Which one of the following statements regarding compandor is FALSE?
16. The quality of a space-link is measured in terms of the __________ ratio.
17. The useful operational life of INSAT-IB (launched in 1983) is expected to end by
18. At present, the radio-frequency band mainly used by most satellites is
19. Orbital disturbances of a geosynchronous satellite are caused by the
20. In a stop-and-wait ARQ system, the transmitting terminal
21. A geostationary satellite is one which
22. The geostationary communication satellite APPLE is parked in the equatorial orbit at
23. Power received from Sun per m2 surface area of a geosynchronous satellite in nearly __________ watt.
24. A certain sound has 10000 times more energy than another sound. The number of times it would sound stronger to a listener is
25. While keeping the down-link frequency constant, the diameter of a satellite antenna is reduced by half. To offer the same EIRP over the increased coverage area, the RF output power has to be increases by a factor of