Affiliation of Author(s):电子信息工程学院

Journal:2017 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP 2017)

Key Words:spaceborne Synthetic Aperture Radar (SAR) spotlight SAR ultra-high resolution one-step motion compensation two-step approach

Abstract:With the development of spaceborne synthetic aperture radar (SAR), the high resolution has become a hot topic again in recent years. However, the higher the resolution is, the worse the accuracy of the traditional hyperbolic range model (HRM) gets. In the case of ultra-high resolution spaceborne SAR, the curved orbit should be taken into account. To overcome this problem, we present a modified data focusing scheme integrated with state-of-the-art airborne SAR motion compensation methods for spaceborne spotlight SAR. Firstly, one-step motion compensation is selected to correct the orbit curvature effectively, which has been applied in ultra-high resolution airborne SAR systems. Meanwhile, the two-step approach (TSA) is introduced to solve the azimuth spectral folding phenomenon. The simulation results validate the effectiveness of the scheme.

Translation or Not:no

Date of Publication:2017-01-01

Co-author:Xiang, Tianshun

Correspondence Author:Daiyin Zhu