森林火灾期间GNSS-R信号反射率与PM_(10)的相关性研究  

Correlation between GNSS-R reflectance and PM_(10) during forest fires

作　　者：蔡王婷 张宁 CAI Wangting;ZHANG Ning(Zhejiang Corps,China Geological Exploration Center for Building Materials Industry,Hangzhou,Zhejiang 310000,China;No.1 Geological Group,Shandong Provincial Bureau of Geology and Mineral Resources(No.1 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources),Jinan,Shandong 250109,China;Key Laboratory of Intelligent Deformation Monitoring of Cableway,Shandong Provincial Bureau of Geology and Mineral Resources,Jinan,Shandong 250109,China)

机构地区：[1]中国建筑材料工业地质勘查中心浙江总队,浙江杭州310000 [2]山东省地质矿产勘查开发局第一地质大队(山东省第一地质矿产勘查院),山东济南250109 [3]山东省地矿局索道智能变形监测重点实验室,山东济南250109

出　　处：《北京测绘》2024年第5期745-749,共5页Beijing Surveying and Mapping

基　　金：中国科学院海岸带环境过程与生态修复重点实验室开放基金(2018KFJJ04)。

摘　　要：本研究以2019年澳大利亚野火事件为例,利用悉尼和布里斯班两地气象站于2019年7月18日至12月31日观测的大气颗粒物(PM)浓度数据和全球卫星导航系统反射测量(GNSS-R)反演的地表反射率数据,采用滑动平均和滑动标准差的分析方法,探究了两种数据之间的相关性。结果显示,火灾发生前,PM_(10)浓度与地表反射率的相关性低于30%;火灾后,该相关性显著增强,相关系数超过65%。从数据波动幅度角度分析,火灾前后两者的相关性分别在50%以上和80%以上,但存在明显的相位差异。本研究证明了PM_(10)浓度的变化对GNSS-R反演地表反射率有显著影响,尤其在PM_(10)浓度较高时。这一发现为火灾遥感监测提供了新的理论基础和实用方法,具有显著的创新意义。This paper studied the 2019 Australian wildfire event and used atmospheric particulate matter(PM)concentration data and surface reflectance data inverted by global navigation satellite system reflectometry(GNSS-R)from weather stations in Sydney and Brisbane between July 18 and December 31,2019.The paper used sliding average and sliding standard deviation analysis methods to explore the correlation between the data.The results show that the correlation between PM_(10) concentration and surface reflectance is less than 30%before the outbreak of fire.After the outbreak of fire,the correlation is significantly enhanced,and the correlation coefficient exceeds 65%.From the perspective of data fluctuation amplitude,the correlation between PM_(10) concentration and surface reflectance before and after the outbreak of fire is above 50%and above 80%,respectively,but there is a significant phase difference.This paper proves that the change in PM_(10) concentration has a significant impact on the surface reflectance inverted by GNSS-R,especially when the PM_(10) concentration is high.This discovery provides a new theoretical basis and practical method for remote sensing monitoring of fire and has significant innovative significance.

关 键 词：全球卫星导航系统反射测量(GNSS-R) 地表反射率 PM_(10) 相关性 

分 类 号：P228[天文地球—大地测量学与测量工程]