The synthetic aperture radar (SAR) is a microwave remote sensing imaging system that consists of a pulsed radar mounted on a moving platform. Usually, the latter is an aeroplane (airborne SAR) or a satellite (spaceborne SAR) moving along an approximately straight-line trajectory (line of flight, or track) with an approximately constant velocity. Transmitted pulses are usually linearly frequency modulated (LFM), that is, they are chirp pulses, as they are called in radar jargon. The SAR imaging system resolution along the range (or cross-track) direction is obtained by matched-filtering the received radar echoes, as in standard pulsed radars; therefore, range resolution depends on chirp bandwidth: it improves as the chirp bandwidth increases.
Acquisition modes
Monti-Guarnieri A.
2021-01-01
Abstract
The synthetic aperture radar (SAR) is a microwave remote sensing imaging system that consists of a pulsed radar mounted on a moving platform. Usually, the latter is an aeroplane (airborne SAR) or a satellite (spaceborne SAR) moving along an approximately straight-line trajectory (line of flight, or track) with an approximately constant velocity. Transmitted pulses are usually linearly frequency modulated (LFM), that is, they are chirp pulses, as they are called in radar jargon. The SAR imaging system resolution along the range (or cross-track) direction is obtained by matched-filtering the received radar echoes, as in standard pulsed radars; therefore, range resolution depends on chirp bandwidth: it improves as the chirp bandwidth increases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
