Satellite Uplink And Downlink Model

The description provided here is imprecise as the exact configuration can vary widely.

Satellite uplink and downlink model.

Low noise amplifier lna amplifies the weak received signal. The term uplink chain is used to refer to the series of pieces of equipment that are used to produce a radio frequency signal for sending out data. When an uplink is being received by the spacecraft at the same time a downlink is being received by earth the communication is called two way. 3 the second type downlink jamming disrupts transmissions sent from the satellite to ground based or airborne receivers using rf.

The direction from vsats to sallite is known as uplink and the direction from satellite to vsats is known as downlink. It receives uplink signal from the satellite antenna and transmits downlink signal to the satellite antenna. Carrier processor performs the frequency down conversion of received signal uplink. Inbound and outbound are often referred to as inroute s and outroute s.

The uplink and downlink frequencies are selectable and can have variety of signals such as video audio voice tone data and telemetry temperature and light intensity. Satellite downlink in this process satellite sends the signal and the earth station receives it. The equation is same as the satellite uplink with a difference that we use the abbreviation d everywhere instead of u to denote the downlink phenomena. This block determines the type of transponder.

The uplink is always the link to the satellite and the downlink is always the link from the satellite irrespective of which side of the link you are teleport hub or vsat remote site. Uplink downlink intersatellite links relay satellite relay satellite relay satellite sensor satellite sensor satellite crossover or intersatellite links mission data launch phase tt c tt c satellite ground station tt c tracking telemetry and control the communications architecture consists of satellites and ground stations interconnected with. The satellite transponder receives signal from uplink transmitter and retransmits at different frequencies to a downlink receiver. The downlink chain is built using nearly the same equipment in reverse order.

Take a look at the drawing below and note the path of devices on the left hand. The uplink and downlink frequencies are selectable and can have variety of signals such as video audio voice tone data and telemetry temperature and light intensity. An rf signal of the same frequency as the targeted uplink signal is transmitted to the satellite aiming to limit the satellite transponder from differentiating between the jamming signal and the actual signal. The communication going from a satellite to ground is called downlink and when it is going from ground to a satellite it is called uplink.

The operating manual illustrates basic theory and glossary of satellite communication terms along with experiments.