Satellite Communication Questions

• 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
• Power received from Sun per m2 surface area of a geosynchronous satellite in nearly __________ watt.
• At present, the radio-frequency band mainly used by most satellites is
• A transponder is a satellite equipment which
• Which one of the following statement is correct?
• In communication satellites, the up-link normally operates at a higher frequency than the down-link because it
• In a stop-and-wait ARQ system, the transmitting terminal
• The angle subtended by earth at geostationary communication satellite is
• The geostationary communication satellite APPLE is parked in the equatorial orbit at
• The ending part of the popular teleserial Mahabharat will be beamed to the viewers
• In satellite communication, frequency modulation is used because satellite channel has
• 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
• The Sun blots out the transmission of a geosynchronous satellite twice a year when satellite passes directly in front of it. This outage lasts for about
• The first geostationary satellite launched in 1965 was called
• Which one of the following statements regarding compandor is FALSE?
• Of the four INSAT-I satellites planned by India so for, only __________ has proved to be successful.
• Rotation of a geosynchronous satellite means its
• A geostationary satellite is one which
• India's first domestic geostationary satellite 1NSAT-IA was launched on 10th April 1982 from
• Radio broadcasting is a familiar example of