Aircraft scatter
Aircraft scatter is a special form of over -the-horizon radio transmission in which radio waves emitted upwards are reflected back to earth by aircraft . This enables short-term ranges of up to 800 km, depending on air traffic, which, due to the curvature of the earth, cannot be achieved with radio connections that require direct visual connections. The frequency ranges used go from a few 100 MHz to a few 10 GHz.
The most common application of airplane scatter is primary radar with spatially separated transmitting and receiving systems in the field of air traffic and military technology . Other applications are in the area of amateur radio , in order to implement short transmissions between amateur radio stations using aircraft scatter. The time range for using the reflection on aircraft is around 30 s to a few minutes and depends, among other things, on the altitude and flight speed of the aircraft. Special operating modes such as WSJT are used for this.
Related to the type of transmission are meteor scatters , which use meteoroids that burn up in the atmosphere as reflectors for the radio waves.
Individual evidence
- ↑ VK7MO and David Smith VK3HZ: Aircraft Scatter on 10 and 24 GHz using JT65c and ISCAT-A. Retrieved April 19, 2020 .
- ^ Aircraft Scatter - QSO Procedure for Airplane Reflections. Retrieved April 19, 2020 .