Side-looking airborne radar

Details Side-looking airborne radar Side-looking airborne radar

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977sciam.237...84j&link_type=abstract

Scientific American, vol. 237, Oct. 1977, p. 84-95.

Astronomy and Astrophysics

Astronomy

Aerial Photography, Imaging Techniques, Microwave Holography, Radar Imagery, Side-Looking Radar, Photomapping, Radar Antennas, Radar Astronomy, Synthetic Arrays, Terrain Analysis

Scientific paper

The article discusses airborne radar systems that form microwave images of adjacent terrain in fine detail, regardless of weather or time of day or night, by looking to the side of an aircraft. The question of why the radar antenna should be pointed to the side is considered along with the resolution of a side-looking airborne radar system, unique properties of the microwave images recorded by such a system, the reflection characteristic of various surfaces, and image geometry. Aperture synthesis with side-looking airborne radar is described, and it is shown that synthetic-aperture radar makes it possible to obtain high-resolution images of terrain many miles away from the aircraft flight path. Holographic imaging with synthetic-aperture radar is examined, practical problems in recording a holographic radar image are noted, and simple solutions to these problems are outlined. Several applications of side-looking airborne radar are reviewed, including terrain-mapping surveys in South America, identification of faults and other tectonic features, site selection for nuclear power plants, and surface imaging of the moon and Venus.

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