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In the present work a multi-satellite SAR system is considered. Between every pair of SAR satellites an interferometric concept is implemented. It allows the height of each pixel on the surface to be evaluated with high precision and a three dimensional map to be created. InSAR geometry is analytically described. Mathematical expressions for determination of current distances between SAR's and detached pixels on the ground, and principal InSAR parameters are derived. A model of linear frequency modulated (LFM) SAR signal with InSAR applications, reflected from the surface is developed. Correlation and spectral SAR image reconstruction algorithms and co-registration procedure are described. To verify the correctness of the signal model and image reconstruction and co-registration algorithm numerical experiment is carried out. 33Lazarov A., Minchev C. and Minchev D. Multi-Satellite Interferometric SAR System.

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