ABSTRACT
The introduction covers the basic physics of non-thermal long wavelength emissions and is followed by a discussion of the receiving elements of radio telescopes (Yagi aerials, horn antennas, etc.). The operating principles of the super-het receiver and of its variants, such as the Dicke radiometer, are discussed in some detail, with the discussion being illustrated by examples of particular Earth- and space-based instruments.
The principles of radar and lidar systems are covered including mono-static, bi-static, synthetic aperture, Doppler, altitude and ground-penetrating, and each type is illustrated by examples of both Earth- and space-based instruments.
Spectroscopic systems at long wavelengths are described including simple tuning, multichannel, autocorrelation and Fourier transform receivers. Again, each type is illustrated by case studies of actual instruments.
A discussion of the main long wavelength emission process for solar system objects is also included.
