What is the down-link frequency range for Ground Earth Station (GES) in SATCOM?

The down-link frequency range for Ground Earth Station (GES) in SATCOM systems typically operates in the range of 4 to 6 GHz, making 4 GHz the lower end of this spectrum. This frequency range is critical for the communication link established between geostationary satellites and ground stations, where signals are transmitted down from the satellite to the Earth.

Using the 4 GHz frequency provides a balance between adequate bandwidth and signal propagation characteristics. Frequencies in this range can penetrate the atmosphere effectively, which is important for maintaining communication reliability. While higher frequencies may offer more bandwidth, they are also more susceptible to atmospheric interference and attenuation, making 4 GHz a fitting choice for a down-link frequency.

Understanding this frequency range is essential for satellite communication specialists, as it directly impacts the engineering and operational decisions when setting up and maintaining SATCOM systems.