Tropospheric phase delay corrections for InSAR data processing
Speaker : Wei-Ji Wang
Adviser : Chung-Pai Chang, Wu-Lung Chang
Abstract
Synthetic Aperture Radar Interferometry (InSAR) is a well established and efficient technique to monitor large scale deformations of the Earth’s surface. However, the detection of low amplitude deformations remains challenging due to atmospheric signals that spread over a broad range of spatial wavelengths. These "signals" can be divided into a stratified component, which correlates with the topography and often dominates the tropospheric signal, and a turbulent component. The dominant contribution to the atmospheric phase delay, which may reach ten centimeters or even higher value, comes from the temporal variation of the stratified troposphere. Hence, choosing the appropriate method to correct the signal is the most important step in InSAR data processing. Three different kinds of atmospheric correction models will demonstrate in this talk.
Reference
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