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In this letter, an optimized scanning in terrain observation by progressive scan synthetic aperture radar (TOPSAR)
mode is studied. A nonuniform steering rate of the radar array antenna in the along-track direction is proposed in order to obtain constant radiometric sensitivity and signal-to-noise ratio. This
is achieved owing to the longer integration time of the echoes received at both ends of the antenna azimuth sweep. By optimizing
iteratively the array discrete steering rate law, the radiometric impact of the array basic element pattern (subarray pattern) can
be accurately compensated. First, simulation results are presented to validate the nonuniform steering TOPSAR.
CitationRuiz, J. [et al.]. Signal-to-noise ratio equalization for TOPSAR mode using a nonuniform steering rate. "IEEE Geoscience and Remote Sensing Letters", 15 Setembre 2011, vol. 9, núm. 2, p. 199-203.
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