Microwave Bands from 1.2 GHz and up are rapidly becoming in demand for commercial applications. The radio amateur community is at great risk of loosing the assigned frequency bands. Microwaves present lots of possibilities for Weaksignal work, EME, SETI and Radio Astronomy. Radio Astronomy is the Science of Astrophysics in the radio spectrum. From Low Frequencies to as high as 300 GHz.
Bodies appear as sources of noise in the frequency domain.
The measurement of the type, quantity and location of these sources of radiation form the observational part in Radio Astronomy. SETI or the Search of Extraterrestrial Intelligence is the Science of Detecting Intelligent Signals from other Civilisations. This science forms a controversial subject in certain circles. Whatever your views are, the Search efforts are right in line with Advanced Weaksignal Detection and Techniques. A large body of Scientific Literature is available on the Internet.