An Approach for Ionospheric Effects Reducing on SAR Imaging

摘要：

For low-frequency (UHF/VHF and L band) spaceborne SAR imaging and applications,the ionospheric effects which lead to image defocusing and Faraday rotation can not be ignored.In this paper,a scheme combining Faraday rotation (FR) correction and image defocusing reduction together was presented. This scheme makes use of Faraday rotation estimated from SAR raw data to deduce the total electron content (TEC) disturbance. The soundness of this polarimetric information based technology is analysed and examined by simulations. The result shows that SAR focusing can be improved and the azimuth shift can be calibrated well.

关键词： Ionospheric Effects Compensation Faraday Rotation TEC Disturbance Autofocus

作者: Dongkun XIA Yang LI Wen HONG Yirong WU

作者单位: University of Science and Technology of China National Key Lab.of Microwave Imaging Technology The Institute of Electronics,Chinese Academy of Sci University of Science and Technology of China National Key Lab.of Microwave Imaging Technology The I

会议类型: 国际会议

会议名称: 2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)

会议地点: 西安

会议语种:英文

页码: 1072-1075

在线出版日期: 2009-10-26（万方平台首次上网日期，不代表论文的发表时间）