INSAR Flat-earth Phase Removal Approach Based on DEM to Settlement Area
نویسندگان
چکیده
منابع مشابه
InSAR Kalman Filter Phase Unwrapping Algorithm Based on SRTM DEM
PU (phase unwrapping) is the key step and important problem in DEM (digital elevation model) extraction and the measurement of surface deformation of InSAR (Interferometric synthetic aperture radar). The CKFPUA (conventional Kalman filter phase unwrapping algorithm) can obtain reliable results in the flat terrain areas, but it caused error transmission not making the accurate inversion of surfa...
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Interferometric Synthetic Aperture Radar (INSAR) is a good technique to produce high resolution digital elevation model (DEM), to detect small earth motions, and so on. Therefore, it is very useful to study this technique. In this paper, some methods about data preprocessing, control points determining, image registration and removal of the phase of the flat earth are introduced, which are one ...
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This paper presents a novel method for estimating the absolute phase offset in interferometric synthetic aperture radar (SAR) measurements for digital elevation model (DEM) generation. The method is based on “phase-offset functions (POF),” relating phase offset to topographic height, and are computed for two different overlapping interferometric data acquisitions performed with considerably dif...
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The paper proposes a Bayesian approach to absolute phase (not simply modulo-2π) estimation in interferometric aperture radar (InSAR). The observation density is 2π-periodic and accounts for the interferometric pair decorrelation and the system noise; the a priori probability of the absolute phase is modeled by a compound Gauss Markov random field (CGMRF). To compute the absolute phase estimate ...
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The quality and accuracy of DEMs derived from repeatpass InSAR is limited by atmospheric phase screen (APS) difference and decorrelation between SAR images. In this paper, we show a compromising but effective approach to avoid DEM gaps and remove height errors induced by the atmosphere. Existing low resolution DEMs are used as external data to improve the quality of interferometric DEM. Our app...
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ژورنال
عنوان ژورنال: ITM Web of Conferences
سال: 2016
ISSN: 2271-2097
DOI: 10.1051/itmconf/20160709004