Motion Compensation for Synthetic Aperture Radar

Kirk, John C.

doi:10.1109/taes.1975.308083

Cited by 126 publications

(46 citation statements)

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“…This approximation is corrected later after obtaining the first order DEM by applying a secondary motion compensation. The correction method of the primary motion compensation is given in [11].…”

Section: Primary Motion Compensationmentioning

confidence: 99%

Generation of high precision DEMs of the Wadden Sea with airborne interferometric SAR

Wimmer

Siegmund

Schwäbisch

et al. 2000

IEEE Trans. Geosci. Remote Sensing

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This paper describes how high-precision DEMs are obtained over the Wadden Sea using the AeS-1 airborne interferometric radar. The Wadden Sea is an intertidal zone along the coast which has height variations less than 5 m over 30 km and is free of vegetation. The resulting DEM has a grid spacing of 2.5 m and an absolute height accuracy of 5 cm rms, as verified by theodolite measurements. The paper describes the radar system, the processing techniques, the test area, the results, and the verification procedure.£ accepted for publication in

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Section: Primary Motion Compensationmentioning

confidence: 99%

Generation of high precision DEMs of the Wadden Sea with airborne interferometric SAR

Wimmer

Siegmund

Schwäbisch

et al. 2000

IEEE Trans. Geosci. Remote Sensing

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“…Therefore, the signal of each azimuth bin is disordered, which affects the final imaging performance. To address this problem, motion compensation (MOCO) is always involved [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Along-Track Motion Compensation for Strip-Map Sar Based on Resampling

Ma¹,

Bai²,

Liang³

et al. 2014

PIER M

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Abstract-The airborne or vehicle-based SARs are very vulnerable to the influences of airflows or road conditions so as to deviate from the predicted trajectory, which undermines the uniformity of the azimuth sampling. As a result, the SAR image quality can get impaired in varying degrees. Since the SAR systems are sensible to the track deviation, the motion compensation (MOCO) algorithms are always applied as pre-processing of SAR raw data. In this paper, mainly with regard to the motion error caused by the forward velocity variation, a 'resampling MOCO' algorithm is proposed as an auxiliary of the widely used bulk MOCO. The simulation result has verified that the performance of the fundamental bulk MOCO algorithm is greatly improved utilizing the proposed method.

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“…Motion compensation algorithms for traditional pulsed SAR have extensively been studied [13], [14], but the underlying differences with an LFM-CW signal make it a challenge to extend existing motion compensation methods to LFM-CW sensors. In pulsed SAR, the platform is assumed to be stationary during each pulse, and the motion takes place between pulses.…”

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confidence: 99%

Theory and Application of Motion Compensation for LFM-CW SAR

Zaugg

Long

2008

IEEE Trans. Geosci. Remote Sensing

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Abstract-Small low-cost high-resolution synthetic aperture radar (SAR) systems are made possible by using a linear frequency-modulated continuous-wave (LFM-CW) signal. SAR processing assumes that the sensor is moving in a straight line at a constant speed, but in actuality, an unmanned aerial vehicle (UAV) or airplane will often significantly deviate from this ideal. This nonideal motion can seriously degrade the SAR image quality. In a continuous-wave system, this motion happens during the radar pulse, which means that existing motion compensation techniques that approximate the position as constant over a pulse are limited for LFM-CW SAR. Small aircraft and UAVs are particularly susceptible to atmospheric turbulence, making the need for motion compensation even greater for SARs operating on these platforms. In this paper, the LFM-CW SAR signal model is presented, and processing algorithms are discussed. The effects of nonideal motion on the SAR signal are derived, and new methods for motion correction are developed, which correct for motion during the pulse. These new motion correction algorithms are verified with simulated data and with actual data collected using the Brigham Young University μSAR system.

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Motion Compensation for Synthetic Aperture Radar

Cited by 126 publications

References 0 publications

Generation of high precision DEMs of the Wadden Sea with airborne interferometric SAR

Generation of high precision DEMs of the Wadden Sea with airborne interferometric SAR

Along-Track Motion Compensation for Strip-Map Sar Based on Resampling

Theory and Application of Motion Compensation for LFM-CW SAR

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