空间科学学报2025，Vol.45Issue(2)：353-363,11.DOI:10.11728/cjss2025.02.2024-0093
风云三号E星GNSS-R反演有效波高敏感性分析
Sensitivity Analysis on the Retrieval of Significant Wave Height Using Fengyun-3E GNSS-R
摘要
Abstract
The Global Navigation Satellite System Reflectometry(GNSS-R)is a new ocean remote sensing technique using L-band forward quasi-specular scattering navigation signals.After comparing the similarities and differences between GNSS-R and other microwave remote sensing techniques,two meth-ods of retrieving Significant Wave Height(SWH)by GNSS-R are proposed:one is a direct method using the leading edge slope of the normalized delay waveform;the other is indirect based on the sea surface roughness measurement.The feasibility and sensitivity of the two methods are analyzed through theoret-ical model and actual measurements from Fengyun-3E data.The results show that due to the low rang-ing accuracy from GNSS signals bandwidth,the leading edge slope is almost insensitive to SWH,which cannot be used for retrieval;the sea surface roughness from GNSS-R can be used to retrieve SWH with an accuracy of about 0.5～0.55 m.Although it still has some limitations,it can be used as a good supple-mentary means to obtain SWH data.The results of this paper can also provide guidance for the design of future GNSS-R satellite missions.关键词
全球导航卫星系统反射遥感/有效波高/敏感性分析/海面粗糙度Key words
GNSS-R/Significant wave height/Sensitivity analysis/Ocean surface roughness分类
海洋科学引用本文复制引用
黄飞雄,夏俊明,尹聪,孙越强,白伟华,翟晓春,徐娜,陈林,胡秀清..风云三号E星GNSS-R反演有效波高敏感性分析[J].空间科学学报,2025,45(2):353-363,11.基金项目
中国科协青年人才托举工程(2023QNR001)和风云卫星应用先行计划(FY-APP-2022.0108)共同资助 （2023QNR001）
