Transponders: Uplink and downlink signals arrive and depart at different frequencies. The incoming or uplink frequency and the outgoing or downlink frequency of a satellite is different because the satellite antenna is common for both uplink. Separate uplink and downlink budgets are provided our evaluation of the total. Transponders convert uplinked frequencies to downlink frequencies and then amplify the converted transmission for sending to Earth. Thermal Control: Guards satellite equipment against extreme changes in temperature. A satellite link is defined as an Earth station - satellite - Earth. Transponders: Uplink and downlink signals arrive and depart at different frequencies. If there is only a downlink happening, the communication is called one-way. If there is only an uplink happening, this communication is called upload. Thermal Control: Guards satellite equipment against extreme changes in temperature. satellite uplink frequency if i have the downlink frequecy of some channel ,is it possible to calculate the uplink Frequency of that channel. uplink is being received by the spacecraft at the same time a downlink is being received by Earth, the communication is called two-way. Power: Most satellites rely on a solar array to convert sunlight into energy. Housing: Constructed from strong materials that can withstand the harsh space environment. If necessary, thrusters and other maneuvers allow a satellite to fine-tune its position and orientation.

Guidance and Stabilization: Sensors monitor the satellite’s position to ensure it remains in the correct orbit and is oriented toward the correct target. Credit: The Space FoundationĪntennas: Satellite antenna systems are used to receive and transmit signals to and from Earth.Ĭommand and Data Handling: The operational heart of a satellite, command and control systems monitor every aspect of the satellite and receive commands from Earth for operation. Sample satellite uplink and downlink with terrestrial stations from 8 0.6 m transmitter uplinking at 514.5 nanometers and 1.2 m receiver downlinking at 830 nanometers.

Satellite uplink and downlink