Earthquake monitoring for multi-temporal images of Ziyuan-3

With frequent occurrence of earthquake disaster, earthquake monitoring becomes increasingly concerned. Global observing by optical remote sensing is an emerging technology widely applied in monitoring temporal changes of topography in earthquake. It provides advantages of large width of observation, fast data acquisition and high time effectiveness. This technique takes advantages of accurate image registration of pre-seismic and post-seismic to spot surface rupture zones. Therefore, the spatial alignment accuracy of multi temporal images becomes a problem that hinder the earthquake monitoring. Considering the adverse impact of different imaging angle, camera lens distortion and other factors on image registration, a new approach of high accurate registration based on constraining positioning consistency in rational function model (RFM) is proposed. Ziyuan3 images of Yutian country in Xinjiang are used to perform the earthquake monitoring experiment. After applying the proposed method, registration accuracy of pre-seismic and postseismic images is better than 0.6 pixel; surface rupture zones caused by earthquake are acquired promptly.

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