星载LiDAR产品辅助的InSAR森林高度反演InSAR forest height retrieval based on spaceborne LiDAR products assistance
谭鹏源,朱建军,付海强
摘要(Abstract):
针对星载重轨InSAR森林高度反演受时间去相干制约与模型解算辅助数据难以获取的问题。考虑ALOS-2 PALSAR-2干涉数据特点,采用一种顾及时间去相干影响的半经验散射模型,利用最新发布的星载激光雷达ICESat-2 ATL08高程产品中的植被高度数据作为辅助数据,并结合主成分分析思想(PCA)对ALOS-2 PALSAR-2相干幅度信息与树高的关联模型进行参数解算。实验结果表明,在ICESat-2树高数据辅助条件下,通过散射模型可以较好抑制时间去相干的影响,进而反演出可靠的模型参数及森林高度(RMSE约为3 m)。本研究验证了联合星载重轨干涉SAR与星载LiDAR数据实现大范围、大尺度森林高度反演的可行性。
关键词(KeyWords): ICESat-2 ATL08高度产品;ALOS-2 PALSAR-2相干幅度;时间去相关;森林高度
基金项目(Foundation): 国家自然科学基金项目(41531068);; 湖南省自然资源调查与监测工程技术研究中心开放课题项目(2020-1);; 中南大学研究生科研创新项目(2019zzts656)
作者(Author): 谭鹏源,朱建军,付海强
DOI: 10.16251/j.cnki.1009-2307.2021.07.011
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