Study of RADARSAT-2 synthetic aperture radar data for observing sensitive factors of global environmental change

Abstract

Abstract. Global environmental change has gained widespread global attention. It is a complex system with special spatial and temporal evolutionary characteristics. Sensitive factors are indicators of global environmental change, and some can be observed with Earth observation technology. RADARSAT-2 is capable of polarimetric and interferometric observations, which can provide an effective way to document some sensitive factors of global environmental change. This study focuses on the usage of RADARSAT-2 data for observing sensitive factors of environmental change and building highly accurate application models that connect synthetic aperture radar data and observable sensitive factors. These include (1) extracting spatiotemporal distribution of large-scale alluvial fan, (2) extracting vegetation vertical structure, (3) detecting urban land cover change, and (4)

Geohazards Monitoring and Assessment Using Multi-Source Earth Observation Techniques

“…Multi-temporal interferometry (MT-InSAR) appears as the unique remote sensing technology able to monitor deformation from space with millimetre accuracy [12][13][14][15]. Indeed, MT-InSAR approach, mainly including Persistent Scatter InSAR (PS-InSAR), Small BAselines Sub-set InSAR (SBAS-InSAR) and Distributed Scatter InSAR (DS-InSAR), have been widely used when extracting the earth's surface deformation [16][17][18] and present an efficient approach for various geohazards, with emphasis to landslide hazard, risk management and disaster prevention [4][5][6][19][20][21][22][23][24][25][26]. MT-InSAR was the main technology used to monitor glaciers, landslides deformations and subsidence in different areas and contexts within this Dragon 4 project's scope.…”