Geometric accuracy in airborne SAR images

Blacknell, D.; Freeman, A.; Quegan, S.; Ward, I. A.; Finley, I.P.; Oliver, C.J.; White, R. G.; Wood, J. W.

doi:10.1109/7.18685

Cited by 71 publications

(38 citation statements)

References 3 publications

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“…The expression of At is similar to that shown in [5] with the inclusion of the squint angle. Indeed, it represents the main limitation in the velocity measurement.…”

Section: Position Accuracysupporting

confidence: 60%

Navigation systems requirements for airborne interferometric SAR platforms

Bara

Monne²,

Broquetas³

IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)

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It is well known that by means of airborne interferometric SAR systems it is possible to generate high precision Digital Elevation Models (DEM), although these platforms are seriously affected by motion instabilities. These deviations are recorded by navigation systems, such as GPS receivers and inertial units. The precision of these systems, and the subsequent off-line processing, determines the level of confidence in the generated heights. Errors in track knowledge lead to incorrect generation of the interferometric phase, which yields height errors in the final DEM. In this paper it is shown an analytical work which is useful to analyze the consequences of such factors onto the bias and the standard deviation of the height errors in Digital Elevation Models.

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“…The expression of At is similar to that shown in [5] with the inclusion of the squint angle. Indeed, it represents the main limitation in the velocity measurement.…”

Section: Position Accuracysupporting

confidence: 60%

Navigation systems requirements for airborne interferometric SAR platforms

Bara

Monne²,

Broquetas³

IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)

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show abstract

“…Such motion errors lead to defocusing, geometric distortions, and radiometric errors in SAR images (Blacknell et al, 1989;Buckreuss, 1991;Franceschetti & Lanari, 1999;Oliver & Quegan, 1998). In this section, we shall discuss these problems and their solutions in details.…”

Section: Problem Of Aircraft Motion Errorsmentioning

confidence: 99%

Synthetic Aperture Radar Systems for Small Aircrafts: Data Processing Approaches

Bezvesilniy¹,

Vavriv²

2012

Recent Advances in Aircraft Technology

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“…SAR raw signal simulation offers a powerful tool to assess, and subsequently to mitigate, the effect of these motion errors. Time-domain simulation [16][17][18][19] is able to exactly account for the effects of motion errors, but for extended scenes, it is computationally inefficient. Frequencydomain simulation, based on the fast Fourier transform (FFT), for the ideal case was presented in [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Efficient Sar Raw Data Simulation Including Trajectory Deviations and Antenna Pointing Errors

Guo¹,

Liu²,

Zhong³

et al. 2017

PIER B

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Abstract-Synthetic aperture radar (SAR) raw signal simulation is profoundly useful for validating SAR system design parameters, testing the effectiveness of different processing algorithms, studying the effects of motion errors, etc. Simulating signal data in frequency domain is more efficient than in time domain. However, the former is difficult account for the effects of both sensor trajectory deviations and antenna pointing error for the stripmap SAR mode. In this paper, we attempt to extend the possibility of the Fourier domain approach to account for trajectory deviations as well as antenna beam pointing errors, which is more concerned for airborne SAR systems. After demonstrating a full two-dimensional Fourier domain simulation, an efficient simulation approach is proposed under certain reasonable assumptions. The proposed approach has higher computational efficiency than simulation in time-domain and also allows for imaging an extended scene. The validity of the proposed approaches is analyzed and discussed. Finally, numerical examples are presented to verify the effectiveness and efficiency of the approach.

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Geometric accuracy in airborne SAR images

Cited by 71 publications

References 3 publications

Navigation systems requirements for airborne interferometric SAR platforms

Navigation systems requirements for airborne interferometric SAR platforms

Synthetic Aperture Radar Systems for Small Aircrafts: Data Processing Approaches

Efficient Sar Raw Data Simulation Including Trajectory Deviations and Antenna Pointing Errors

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