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Conference Papers Year : 2014

Determination of glacier velocities at a large spatial scale from optical satellite archives

Abstract

In this paper we present a processing strategy to derive glaciers' velocity fields from a complete satellite archive. All possible pairs with a specified time span are formed, submitted to the same preprocessing and matched together to derive velocity fields. All the results are then selected on a pixel-by-pixel basis based on the confidence of the offset-tracking and merged together by computing the median in a spatio-temporal neighboorhood. The method is applied to 206 images covering the Karakoram region and a period of 3 years. This allows us to estimate a velocity for over 90% of the glaciers' area and to reduce the residuals from 9.9m/yr to 2.1m/yr.
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hal-01154179 , version 1 (21-05-2015)

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Amaury Dehecq, Emmanuel Trouvé, Noel Gourmelen. Determination of glacier velocities at a large spatial scale from optical satellite archives. IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Jul 2014, Quebec, Canada. ⟨10.1109/IGARSS.2014.6947366⟩. ⟨hal-01154179⟩
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