Satcom is a wireless communication between ground-based stations (including those in low-altitude atmosphere) that utilizes satcoms as relays. This technology consists of two parts: satcom and earth station.
The characteristics of satcom communication include: large communication range that is not easily affected by terrestrial disasters; ability to set up circuits at any location within the range of the satcom's electromagnetic waves; economical implementation of broadcast, multi-address, and flexible communication circuits that can handle varying traffic demands; ability to use the same channel for different directions or intervals.
The airborne satcom system consists of multiple components, among which the satcom communication system, antenna system, modem, transmission system, and ground control station are the most important.
It can transmit information from a plane to the ground or to other aircraft and can also receive information from the ground or other aircraft. The system mainly consists of components such as the satcom, receiver, and transmitter, with the satcom responsible for receiving the signal and relaying it to the receiver, which further processes and relays the signal to other systems.
The antenna system primarily includes the satcom receiving antenna and the satcom transmitting antenna, both of which can transmit signals between the airborne satcom communication system and the satcom. These antenna systems need to be precisely adjusted to ensure their ability to receive and send clear signals.
The modem can convert signals into digital or analog signals and transmit them to other systems. The role of this system is to convert the signal into a transmission-friendly format and to decode it upon reception.
The transmission system includes devices used to transmit information, such as cables, radio waves, etc. These devices transmit information from one end to the other while ensuring the accuracy and integrity of the transmission.
The ground control station is responsible for monitoring and controlling the airborne satcom system. It receives signals from the aircraft and satcom and relays them to other locations. The role of the ground control station is to monitor and control the status of the airborne satcom system, ensuring its normal operation and the reliability of information transmission.
Overall, the airborne satcom communication system is an essential component of modern aircraft, allowing efficient communication between the aircraft and ground stations and other aircraft.