Ionosphere correction algorithm for spaceborne SAR imaging  

作　　者：Lin Yang Mengdao Xing Guangcai Sun Lin Yang Mengdao Xing Guangcai Sun(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)

机构地区：[1]School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China [2]National Laboratory of Radar Signal Processing,Xidian University,Xi'an 710071,China

出　　处：《Journal of Systems Engineering and Electronics》2016年第5期993-1000,共8页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61222108);the Research Fund for the Doctoral Program of Higher Education of China(20120203130001);the Fundamental Research Funds for the Central Universities(2015HGBZ0106;2015HGQC0005)

摘　　要：For spaceborne synthetic aperture radar （SAR） imaging,the dispersive ionosphere has significant effects on the propagationof the low frequency （especially P-band） radar signal. Theionospheric effects can be a significant source of the phase error inthe radar signal, which causes a degeneration of the image qualityin spaceborne SAR imaging system. The background ionosphericeffects on spaceborne SAR through modeling and simulation areanalyzed, and the qualitative and quantitative analysis based onthe spatio-temporal variability of the ionosphere is given. A novelionosphere correction algorithm （ICA） is proposed to deal with theionospheric effects on the low frequency spaceborne SAR radarsignal. With the proposed algorithm, the degradation of the imagequality caused by the ionosphere is corrected. The simulation resultsshow the effectiveness of the proposed algorithm.For spaceborne synthetic aperture radar （SAR） imaging,the dispersive ionosphere has significant effects on the propagationof the low frequency （especially P-band） radar signal. Theionospheric effects can be a significant source of the phase error inthe radar signal, which causes a degeneration of the image qualityin spaceborne SAR imaging system. The background ionosphericeffects on spaceborne SAR through modeling and simulation areanalyzed, and the qualitative and quantitative analysis based onthe spatio-temporal variability of the ionosphere is given. A novelionosphere correction algorithm （ICA） is proposed to deal with theionospheric effects on the low frequency spaceborne SAR radarsignal. With the proposed algorithm, the degradation of the imagequality caused by the ionosphere is corrected. The simulation resultsshow the effectiveness of the proposed algorithm.

关 键 词：synthetic aperture radar （SAR） radar imaging highresolution ionospheric effects total electron content （TEC）. 

分 类 号：TN957.52[电子电信—信号与信息处理]