Fusion of glacier displacement observations with different temporal baselines

Laurane Charrier (1, 2) , Y Yan (2) , Elise Colin-Koeniguer (1) , E. Trouvé (2)

1 DTIS, ONERA, Université Paris Saclay [Palaiseau]
2 LISTIC - Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance

This article proposes a method based on the temporal closure of the displacement measurement's network. The aim is to extract short-term glacier velocities and to use data redundancy to reject outliers and reduce uncertainty. By using all the available displacement measurements, we retrieve a displacement time series between consecutive observation dates by means of an inversion. The proposed inversion method is an Iterative Weighted Least Square (IWLS) with a regularization on the discrete derivative of displacements. We apply our method to a glaciers velocity data-set covering Fox Glacier in the Southern Alps of New Zealand.

Mots clés: Glacier; velocity; time series; fusion

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]; Mathématiques [math]; Informatique [cs]

Laurane Charrier, Y Yan, Elise Colin-Koeniguer, E. Trouvé. Fusion of glacier displacement observations with different temporal baselines. IGARSS 2021, Jul 2021, Bruxelles, Belgium. ⟨10.1109/IGARSS47720.2021.9553831⟩. ⟨hal-03340445⟩