UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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direct the spot beam to a particular region of space on Earth
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strengthen the beam to overcome the cosmic noise
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make corrections in change of polarisation of the beam
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select a particular channel in transmission and reception
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Detailed explanation-1: -Antennas, along with transponders, are the key to satellite communications. Antennas affixed to satellites are, by necessity, used for both receiving and sending signals. Antennas on the satellite receive signals uplinked (transmitted) from various sources on Earth.
Detailed explanation-2: -Microwaves are used for satellite communication since the lower bands get reflected by the ionosphere.
Detailed explanation-3: -A typical satellite link involves the transmission or uplinking of a signal from an Earth station to a satellite. The satellite then receives and amplifies the signal and retransmits it back to Earth, where it is received and reamplified by Earth stations and terminals.
Detailed explanation-4: -Telecommunications satellites are usually placed in geostationary Earth orbit (GEO). GEO is a circular orbit 35 786 kilometres above Earth’s equator and follows the direction of Earth’s rotation.