摘要
针对当今极地高精度测绘存在专用天基技术手段空白的现状,提出了可单星部署的毫米波双模式干涉SAR载荷,能实现对重点观测区域的稳定基线测绘以及广域测速。在传统微波频段重轨、分布式星载合成孔径雷达干涉的基础上,分析了毫米波频段下顺轨和交轨基线的基线指标特点,对其单星干涉原理进行了解释。对所提出的毫米波高精度干涉SAR进行了载荷单机配置、工作模式、典型误差源分析,与传统的测绘体制相比,能够避免多星下最优基线的控制及实现代价并获得高干涉精度。
In view of the fact that there is no special space-based technology for high-precision surveying and mapping of polar regions in China at present,a millimeter-wave dual-mode interferometric synthetic aperture radar(InSAR)payload is proposed,which can be deployed by a single satellite and realize the stable baseline surveying and mapping of key observation areas and the velocity measurement of wide areas.Based on the interferometry of traditional microwave frequency band repeat-orbit and distributed space-borne synthetic aperture radar(SAR),the characteristics of along-track and cross-track baseline parameters in millimeter-wave frequency bands are analyzed,and the principle of single-satellite interferometry is explained.The proposed millimeter-wave high-precision InSAR is verified by experiments on payload instrument configuration,working mode,and typical error source analysis.The results show that compared with traditional surveying and mapping,the proposed InSAR payload can avoid the control and implementation costs of optimal baselines under multiple satellites and obtain high interferometric accuracy.
作者
吴思利
王辉
郑世超
WU Sili;WANG Hui;ZHENG Shichao(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2021年第S01期13-19,66,共8页
Aerospace Shanghai（Chinese&English）
基金
“上海市毫米波空天信息获取及应用技术重点实验室”项目资助
关键词
干涉合成孔径雷达(InSAR)
极地观测
遥感
毫米波SAR
interferometric synthetic aperture radar(InSAR)
polar observation
remote-sensing
millimeter wave synthetic aperture radar(SAR)
