科研之友
微信
新浪微博
Facebook
分享链接
摘要
Due to the background ionosphere and irregularities in the electron density of the ionosphere, the space-borne synthetic aperture radar (SAR) imaging at low-frequency is affected by it inevitably. From the simulations, it can be seen that under the strong fluctuation regimes, the path delay of multiple scattering plays an important role in the total path delay of SAR signals. Aiming at this problem, a tri-band phase autofocus method of TEC retrieval based on the SAR echo is proposed, which compensates the effects of the ionosphere on SAR imaging. Simulation results show that when this method is used under strong fluctuations, both the image quality in range and the precision of SAR calibration are generally increased after compensation.
