IMPACTS OF IONOSPHERIC TEMPORAL VARIABILITY ON L-BAND GEO SAR IMAGING

被引：1
|
作者：
Zhang, Qingbo [1 ]
Yu, Ze [1 ]
Xiao, Peng [1 ]
机构：
[1] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China
来源：
2016 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) | 2016年
关键词：
GEO SAR; Background ionosphere; Temporal Variability; large scene; multiple targets;
D O I：
10.1109/IGARSS.2016.7729302
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The integration aperture time of Geosynchronous synthetic aperture radar (GEO SAR) is much longer than that of LEO SAR. Compared with LEO SAR, of which TEC is assumed to be constant, the time-varying ionospheric effects on GEO SAR imaging can't be ignored, and GEO SAR has the advantages of shorter repeat period and wider swath. Due to the wide swath of GEO SAR, it is necessary to take the effects of ionospheric temporal variance at different targets in a large scene into consideration. The letter analyzes the time-varying ionospheric effects on GEO SAR imaging. Finally, the USTEC data is used to analyze the time-varying effects at whole orbit of GEO SAR, and explore whether the effects are consistent at different targets in a large scene. Simulation results show GEO SAR azimuth imaging performance becomes deteriorated and defocused, and the effects are different at different positions in a large scene.
引用
收藏
页码：1194 / 1197
页数：4
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