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Title: | Inferring missing data in satellite chlorophyll maps using turbulent cascading |
Authors: | Pottier, Claire; Turiel, Antonio ![]() |
Keywords: | Oceanic phytoplankton Satellite ocean color images Missing data Turbulence cascading Wavelet representation |
Issue Date: | 11-Sep-2008 |
Publisher: | Elsevier |
Citation: | Remote Sensing of Environment 112(12): 4242-4260 (2008) |
Abstract: | Oceanic turbulent flows develop complicated patterns, with eddies, filaments and shear currents. Although usually referred as chaotic, their inner organization is strongly hierarchical: turbulent flows develop cascades, which transfer properties such as energy or scalar density from larger to smaller scales. In this work, we present a novel algorithm based on the cascade and able to fill data gaps in satellite images (particularly, chlorophyll concentration maps). The first step is to show that cascade processes for chlorophyll-a concentration images take a simple, explicit form when an appropriate wavelet (here Battle–Lemarié of order 3) representation is used. A reconstruction algorithm exploiting the cascade structure is then given with a detailed description. We discuss the validity and quality of this algorithm when applied to SeaWiFS and MODIS-Aqua ocean color images. An application to merging data from multiple satellite missions is presented together with a demonstration of the benefit of this algorithm over two other merging methods |
Description: | 19 pages, 21 figures, 1 table |
Publisher version (URL): | https://doi.org/10.1016/j.rse.2008.07.010 |
URI: | http://hdl.handle.net/10261/15461 |
DOI: | 10.1016/j.rse.2008.07.010 |
ISSN: | 0034-4257 |
Appears in Collections: | (ICM) Artículos |
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