350 rub
Journal Achievements of Modern Radioelectronics №5 for 2015 г.
Article in number:
High-resolution geocoded image synthesis with taking into account the whole set of perturbation factors in Spotlight Mode in airborne and spaceborne SAR
Keywords: reference (function) in frequency domain Legendre transform Stolt transform inverse geocoding sub-meter resolution slant along-way coordinates relief factor ray aiming error
Authors:
S.G. Likhanskyi - Ph.D. (Eng.), Leading Research Scientist, JSC «Concern «VEGA». E-mail: mail@vega.su
Abstract:
New high-precision algorithm of sub-meter resolution SAR image synthesis in Spotlight mode is considered. This algorithm is being very close quasi-classic approximation of well known very exact and very slow Back Projection Algorithm (BPA). The new algorithm is considerably (200-500 times) faster then BPA. The algorithm takes in account the whole set of perturbation factors - cur-rent ballistic data and look parameters in high orders, ray aiming error and ray diagram form, scene relief - according to the digital Earth map, quasi-classic hologram spectrum calculation method non-exactness. The output image is being written in horizontal scene coordinates - not in traditional along-way slant coordinates azimuth and range. So the SAR image geo-coding procedure is not necessary. This algorithm is appropriate both for the spaceborne and the airborne SAR.
Pages: 88-96
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