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

International audience 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 resu...

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Bibliographic Details
Published in:2014 IEEE Geoscience and Remote Sensing Symposium
Main Authors: Dehecq, Amaury, Trouvé, Emmanuel, Gourmelen, Noel
Other Authors: Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance (LISTIC), Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ), School of Geosciences Edinburgh, University of Edinburgh
Format: Conference Object
Language:English
Published: HAL CCSD 2014
Subjects:
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
Canada
glacier*
Online Access:https://hal.archives-ouvertes.fr/hal-01154179
https://doi.org/10.1109/IGARSS.2014.6947366
Description
Summary:International audience 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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