Joint Interpolation and Representation Learning for Irregularly Sampled Satellite-Derived Geophysical Fields - Archive ouverte HAL Access content directly
Journal Articles Frontiers in Applied Mathematics and Statistics Year : 2021

Joint Interpolation and Representation Learning for Irregularly Sampled Satellite-Derived Geophysical Fields

(1, 2) , (2) , (2, 1) , (3, 4)
1
2
3
4

Abstract

Earth observation satellite missions provide invaluable global observations of geophysical processes in play in the atmosphere and the oceans. Due to sensor technologies (e.g., infrared satellite sensors), atmospheric conditions (e.g., clouds and heavy rains), and satellite orbits (e.g., polar-orbiting satellites), satellite-derived observations often involve irregular space–time sampling patterns and large missing data rates. Given the current development of learning-based schemes for earth observation, the question naturally arises whether one might learn some representation of the underlying processes as well as solve interpolation issues directly from these observation datasets. In this article, we address these issues and introduce an end-to-end neural network learning scheme, which relies on an energy-based formulation of the interpolation problem. This scheme investigates different learning-based priors for the underlying geophysical field of interest. The end-to-end learning procedure jointly solves the reconstruction of gap-free fields and the training of the considered priors. Through different case studies, including observing system simulation experiments for sea surface geophysical fields, we demonstrate the relevance of the proposed framework compared with optimal interpolation and other state-of-the-art data-driven schemes. These experiments also support the relevance of energy-based representations learned to characterize the underlying processes.
Fichier principal
Vignette du fichier
fams-07-655224.pdf (2.15 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03349912 , version 1 (21-09-2021)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Ronan Fablet, Maxime Beauchamp, Lucas Drumetz, François Rousseau. Joint Interpolation and Representation Learning for Irregularly Sampled Satellite-Derived Geophysical Fields. Frontiers in Applied Mathematics and Statistics, 2021, 7, pp.655224. ⟨10.3389/fams.2021.655224⟩. ⟨hal-03349912⟩
41 View
30 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More