Key features: Discussion of principles, design, and operation including radar functions, types, frequencies, configurations and nomenclature. Characteristics and capabilities of key subsystems including antennas, transmitters, receivers, T/R modules, and signal and data processing. Radar performance evaluation techniques and data including radar cross section, signal-to-noise ratio, target detection, search, radar measurements, and tracking. Discussion and data on the radar environment including atmospheric refraction and losses, rain attenuation, terrain, sea and rain clutter, terrain masking and multipath, ionospheric effects on radar performance, and electronic countermeasures. Radar techniques including waveform design, moving-target indication (MTI), displaced phase-center arrays (DPCA), pulse Doppler operation, space-time adaptive processing (STAP), and target classification, discrimination and identification.