Abstract

There are not only applications of interferometry for radio astronomy but also for radar techniques. Particularly the increasingly important field of space research requires methods which yield measurements of position and velocity of flying objects to the highest precision. The interferometer used in radio astronomy is a passive one, as the energy source of emitted radiation is identical with the target. A tracking radar which uses phase information can however be regarded as an active interferometer and referred to as an interferometer radar; the expressions simultaneous phase-comparison radar and phase comparison monopulse radar are also in use (76,77,206).

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