P-Band InSAR for Geohazard Detection over Forested Terrains: Preliminary Results

编号 030031702

推送时间 20211115

研究领域 森林经理 

年份 2021 

类型 期刊 

语种 英语

标题 P-Band InSAR for Geohazard Detection over Forested Terrains: Preliminary Results

来源期刊 REMOTE SENSING

期 第317期

发表时间 20211114

关键词 P-band;  AirMOSS;  InSAR;  decorrelation;  vegetation;  geohazards;  landslides; 

摘要 Decorrelation of X, C, and L-band InSAR (Interferometric Synthetic Aperture Radar) over densely vegetated regions is a common obstacle for detecting ground deformation beneath forest canopies. Using long-wavelength P-band SAR sensors (wavelength of 69.72 cm), which can penetrate through dense forests and collect relatively consistent signals from ground surface, is one potential solution. Here, we experimented using the NASA JPL (Jet Propulsion Laboratory)’s P-band AirMOSS (Airborne Microwave Observatory of Subcanopy and Subsurface) radar system to collect repeat-pass P-band SAR data over densely vegetated regions in Oregon and California (USA), and generated by far the first P-band InSAR results to test the capability of P-band InSAR for geohazard detection over forested terrains. Our results show that the AirMOSS P-band InSAR could retain coherence two times as high as the L-band satellite ALOS-2 (Advanced Land Observing Satellite-2) data, and was significantly more effective in discovering localized geohazards that were unseen by the ALOS-2 interferograms over densely vegetated areas. Our results suggest that the airborne P-band InSAR could be a revolutionary tool for studying geohazards under dense forest canopies.

服务人员 付贺龙

服务院士 唐守正

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