Effects of Fluctuation in Refractive Index of Atmosphere on Synthetic Aperture Radar Images

被引：0
|
作者：
Wang, Ling [1 ]
Yazici, Birsen [2 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Key Lab Radar Imaging & Microwave Photon, Minist Educ, Nanjing 210016, Jiangsu, Peoples R China
[2] Rensselaer Polytech Inst, 110 8th St, Troy, NY 12180 USA
来源：
2017 IEEE RADAR CONFERENCE (RADARCONF) | 2017年
基金：
美国国家科学基金会;
关键词：
D O I：
暂无
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：
We quantitatively analyze the artifacts in SAR imagery due to fluctuations in the refractive index of the atmosphere. SAR image reconstruction algorithms ignore atmospheric absorption and assume unity for the refractive index of the atmosphere. We assume a complex-valued refractive index for the atmosphere and analyze the errors in reconstructed images due to absorption and fluctuations in the speed of electromagnetic ( EM) waves. Absorption leads to amplitude errors which can be viewed as a filtering error. This error can be characterized as systematic variations in the ground reflectivity function. Fluctuations in the speed of EM waves lead to phase errors which manifest as positioning errors in SAR imagery.
引用
收藏
页码：169 / 174
页数：6
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