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Article Dans Une Revue IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Année : 2021

Temporal Consolidation Strategy for Ground-Based Image Displacement Time Series: Application to Glacier Monitoring

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In this article, we present a method for combiningimage-based displacements to build time series. This method takesadvantage of the redundancy of these displacements, which comesfrom multiple possible combinations between images. The proposedmethod combines common master series with a differentmaster date to construct a single time series of relative displacements.We were able to test thismethod on displacements computedusing images from a stereo time-lapse device recording imagesof the Argentière glacier during the summer and fall of 2019.Our method was compared to two other displacement aggregationstrategies: a simple common master approach and the classicalinversion method. In order to perform this comparison, displacementdata from four permanent GPS are used. The results showthat our method provides a more accurate time series of relativedisplacements than those obtained with the other methods. Thehigher accuracy of the proposed method makes the detection ofseasonal variations in glacier velocity possible.
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hal-04047812 , version 1 (31-03-2023)

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Guilhem Marsy, Flavien Vernier, Emmanuel Trouvé, Xavier Bodin, William Castaings, et al.. Temporal Consolidation Strategy for Ground-Based Image Displacement Time Series: Application to Glacier Monitoring. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021, 14, pp.10069-10078. ⟨10.1109/JSTARS.2021.3115231⟩. ⟨hal-04047812⟩
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