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During mapping a big area consisting of several interferometric SAR (InSAR) scenes, joint calibration procedure is proposed in this paper in order to achieve the accurate three-dimensional location and backscatter, and ensure their continuity among adjacent scenes. The proposed procedure contains geometric calibration and backscatter calibration. Geometric calibration deals with multiple InSAR scenes...
During Synthetic Aperture Radar (SAR) motion compensation processing, the residual uncompensated motion errors may degrade SAR images, and these errors mainly result from the positioning inaccuracies of the track and target. By analyzing SAR motion compensation method and the effect of the track and target positioning inaccuracies, this paper presents a model to calculate the residual uncompensated...
In order to reduce the complex image registration process for the airborne dual-antenna interferometric SAR (InSAR) system, a new auto-registration imaging algorithm is presented in the paper, which implements the registration step directly at the SAR raw data processing stage based on the EOK algorithm and the ECS algorithm. For the mismatch caused by the path difference of two antennas, it realizes...
This paper proposes a new approach of motion compensation for dual-antenna Airborne InSAR system with severe attitude. Phase correction which is based on baseline model is introduced to traditional dual reference track method. Experimental results with InSAR data acquired by "National West Mapping Project" airborne system shows that our algorithm can get high accuracy DEM, which testifies...
The accuracy of the digital elevation model (DEM) generated by the interferometric synthetic aperture radar (SAR) partly depends on the accuracy of system parameters, so it is necessary to calibrate the system parameters. The traditional calibration method models the elevation error as a linear function of parameter biases, and solves the biases through the sensitivity equations. This paper presents...
When using motion compensation approaches based on the measurement of motion sensors, the residual uncompensated motion errors due to measurement instrument inaccuracies contribute to phase errors and hence degrade Synthetic Aperture Radar (SAR) images. This paper presents a model to compute the phase error caused by Inertial Measurement Unit (IMU) measurement inaccuracies. By analyzing SAR motion...
In airborne two-antenna interferometric SAR system, the returned pulse may be reflected by parts of the aircraft platform into the antennas, and this is called multipath effect which will cause oscillating phase errors and hence height errors. This paper presents a theoretical model to compute the multipath error. In this model the multipath phase error is a function of look angle or ideal phase,...
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