Why Optical Images are Easier to Understand Than Radar Images?--From the Electromagnetic Scattering and Signal Point of View
As the bandwidth of SAR/ISAR system continuously increases as well as the synthetic aperture techniques develop,the spatial resolution of radar image is higher and higher.However,the high resolution of radar image does not mean the resolving ability for targets is high.We may have the same experience that the optical image is much easy to understand than radar image even if it has less resolution.A simple and frank explanation is due to the wavelengths of optical waves are much shorter than that of microwaves at which radars usually work,e.g.,in the order of 10-5-10-4.Are there any the deep reasons for this? We will illustrate the inherent reasons in this paper from the aspects of imaging geometry and principle,electromagnetic scattering,signal characteristics,and so on.
Yunhua Zhang Jingshan Jiang
The Key Laboratory of Microwave Remote Sensing Center for Space Science and Applied Research,Chinese Academy of Sciences No.1 Nanertiao,Zhongguancun,Haidian,Beijing 100190,China
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
1411-1415
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）