SOLAR SYSTEM

Detailed explanation-1: -The uplink frequency is higher than that of the down because the transmit amplifier in the down link has a limited power supply power budget as it is on board of the satellite where the satellite is powered by photovoltaic generators.

Detailed explanation-2: -Satellite communication uses different frequency bands for uplink and downlink to avoid interference. video signals have large data, so to transfer these signals we need high bandwidth, like 4.2 MHz.

Detailed explanation-3: -The frequency with which, the signal is sent into the space is called as Uplink frequency. Similarly, the frequency with which, the signal is sent by the transponder is called as Downlink frequency.

Detailed explanation-4: -In satellite telecommunication, a downlink is the link from a satellite down to one or more ground stations or receivers, and an uplink is the link from a ground station up to a satellite. Some companies sell uplink and downlink services to television stations, corporations, and to other telecommunication carriers.

Detailed explanation-5: -The transmission of signal from first earth station to satellite through a channel is called as uplink. Similarly, the transmission of signal from satellite to second earth station through a channel is called as downlink.