星载被动微波亮温影像轨道间隙填补:进展与展望  

Orbital Gap Filling for Satellite Passive Microwave Brightness Temperature Images:Progress and Prospects

作　　者：王永杰 张晓东 唐文彬 赵少杰 马晋 孟义真 王子卫 周纪 WANG Yongjie;ZHANG Xiaodong;TANG Wenbin;ZHAO Shaojie;MA Jin;MENG Yizhen;WANG Ziwei;ZHOU Ji(School of Resources and Environment,University of Electronic Science and Technology of China,Chengdu 611731,China;Shanghai Spaceflight Institute of TT&C and Telecommunication,Shanghai 201109,China;State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing 100875,China)

机构地区：[1]电子科技大学资源与环境学院,四川成都611731 [2]上海航天测控通信研究所,上海201109 [3]北京师范大学地表过程与资源生态国家重点实验室,北京100875

出　　处：《地球科学进展》2025年第1期99-110,共12页Advances in Earth Science

基　　金：国家自然科学基金项目(编号:42271387,U23A2018)资助.

摘　　要：被动微波亮度温度是反演多种地表参量的关键基础数据。极轨卫星搭载的被动微波成像仪获得的被动微波亮温影像在相邻轨道之间存在因轨道间隙导致的观测缺失。填补轨道间隙有利于提高基于亮温生成的次生产品的时空完整性、增强其应用潜力。通过回顾被动微波辐射传输理论、轨道间隙形成原因及其影响,针对基于多源数据填补与基于有效源数据重构这两类遥感数据缺失值填补方法进行了总结,分析了其应用于被动微波亮温影像轨道间隙填补的前景。在梳理被动微波亮温轨道间隙填补的相关研究与存在的问题时,发现目前已有针对星载被动微波亮温轨道间隙填补的研究较少且均使用了多源数据,传感器的差异导致这类方法普适性不高。总结了当前研究所面临的挑战,从使用再分析资料和时间序列建模的角度,探讨了在考虑特殊下垫面情况下,构建具有良好普适性的高精度统一重构方法的未来方向。Passive Microwave Brightness Temperature(PMWBT)is crucial for retrieving various land surface parameters.However,PMWBT images often exhibit many missing observations,particularly in lowlatitude areas,owing to the limited coverage of polar-orbit satellites equipped with PMW radiometer imagers.Filling these gaps is essential to enhance the spatiotemporal integrity and application potential of PMW-derived products.To better understand the problem and propose solutions,the PMW radiative transfer theory and the reasons for the observation gaps are comprehensively reviewed.Subsequently,two filling approaches,multisource data filling and effective data reconstruction,which are commonly used in remote sensing,were introduced and assessed for their suitability in filling PMWBT gaps.Upon reviewing related research and existing issues in filling PMW BT orbital gaps,it was observed that current studies on filling satellite-borne passive microwave brightness temperature orbital gaps are limited,and all use multi-source data with low generalizability because of sensor differences.In conclusion,the current research status and challenges are succinctly summarized.Furthermore,from the perspective of using reanalysis data and time-series modeling,the construction of a high-precision,general reconstruction method under special underlying surface conditions was explored.

关 键 词：被动微波亮温 轨道间隙 缺失填补 极轨卫星 遥感 

分 类 号：P237[天文地球—摄影测量与遥感]