Assessment Model of Atmosphere Transmitting Influence on High-resolution Airborne SAR Stereo Positioning  

作　　者：ZHENG Zhaoqing PANG Lei CHEN Xuexing 

机构地区：[1]Shandong University of Technology, Zibo 255049, China [2]Chinese Academy of Surveying and Mapping, Beijing 100039, China

出　　处：《Chinese Geographical Science》2008年第4期369-373,共5页中国地理科学（英文版）

基　　金：Under the auspices of National High Technology Research and Development Program of China (No. 2001AA132010)

摘　　要：The influence derived from atmosphere transmitting of radar wave, in the application of high-resolution airborne Synthetic Aperture Radar (SAR) stereo positioning, may produce some phase errors, and eventually be introduced into positioning model. This paper described the principle of airborne SAR stereo positioning and the error sources of stereo positioning accuracy that arose from atmosphere transmitting, established a corresponding assess- ment model of atmosphere transmitting influence, and testified the model and the assessment principle taking the 1-m resolution airborne SAR images of Zigong City, Sichuan Province in China, as the test dataset. The test result has proved that the assessment model is reliable and reasonable. And, it has shown that the phase error arisen from time delay is the main error source during the atmosphere transmitting, which has much more influences on cross-track di- rection and introduces a stereo positioning error of about eight meters, but less on the along-track direction.The influence derived from atmosphere transmitting of radar wave, in the application of high-resolution airborne Synthetic Aperture Radar （SAR） stereo positioning, may produce some phase errors, and eventually be introduced into positioning model. This paper described the principle of airborne SAR stereo positioning and the error sources of stereo positioning accuracy that arose from atmosphere transmitting, established a corresponding assessment model of atmosphere transmitting influence, and testified the model and the assessment principle taking the 1-m resolution airborne SAR images of Zigong City, Sichuan Province in China, as the test dataset. The test result has proved that the assessment model is reliable and reasonable. And, it has shown that the phase error arisen from time delay is the main error source during the atmosphere transmitting, which has much more influences on cross-track direction and introduces a stereo positioning error of about eight meters, but less on the along-track direction.

关 键 词：airborne SAR atmosphere transmitting assessment model radar wave stereo positioning 

分 类 号：P4[天文地球—大气科学及气象学]