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This paper analyzes the various sources of the errors in the full link of the SAR satellite, and also studies the methods of the integrated error compensation for SAR. These methods mainly include the method based on the control unit, the method based on the measured data and the method based on the SAR echo data. This is an important reference for the high precision SAR imaging and data processing.
Geosynchronous Earth Orbit Synthetic Aperture Radar (GEO SAR) has the advantages of short repeat time, large coverage area and so on. For the long aperture time and high orbit height, the effect of velocity space-variance on GEO SAR is more severe than on Low Earth Orbit SAR (LEO SAR). However, the spatial variation of velocity is different in different directions, which will bring new challenge to...
Because of the large orbital eccentricity, the slant range history of GEO SAR is “near-far-near” at apogee, which is opposite to LEO SAR. This paper presents a modified slant range model with negative curvature to fit the “near-far-near” slant range history for GEO SAR at apogee. Based on the principle of stationary phase (POSP), an accurate two-dimension spectrum is derived from the modified range...
SAR interferometry processing technology has developed for a few decades, and it is widely used in many geoscience applications. Nevertheless, conventional SAR interferometry processing methods do not suit for space-borne spotlight SAR interferometry processing. Based on co-registration with Doppler centroid frequency estimation and joint phase unwrapping method, a novel space-borne spotlight SAR...
Compared with LEO SAR, the orbital altitude of GEO SAR is higher and the orbital eccentricity is larger, so the spatial decorrelation model of traditional LEO repeat pass InSAR can not be applicable for the GEO repeat pass InSAR. Considering the special problems of GEO repeat pass InSAR, a spatial decorrelation model is established which is applicable for the GEO repeat pass InSAR and the expressions...
Ground-based synthetic aperture radar differential interferometer (GB D-InSAR) has already been recognized as a powerful tool, complementary to spaceborne SAR interferometry, for deformation monitoring. This application calls for rigid demand in measurement accuracy (to the degree of millimetre or even submillimeter). SAR trajectory error is one of the main factors degrading the measurement accuracy,...
In the future, Synthetic Aperture Radar (SAR) requires enhanced capabilities, such as all-weather and better resolving power, more widely used in sciences, etc. New system to improve the control and monitor capability is desired by the development of the carrying-platform and SAR itself. A fast and small control and monitor system has been developed and tested. It employs SOPC (System On Programmable...
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