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Variational Approaches on Discontinuity Localization and Field Estimation in Sea Surface Temperature and Soil Moisture Interpolations
Authors: Walter Sun, Müjdat Çetin, W. Carlisle Thacker, T. Mike Chin, and Alan S. Willsky
Published in: IEEE Trans. Geoscience and Remote Sensing
Publication year: 2006
Abstract: Some applications in remote sensing require esti- mating a field containing a discontinuity whose exact location is a priori unknown. Such fields of interest include sea surface temperature in oceanography and soil moisture in hydrology. For the former, oceanic fronts form a temperature discontinuity, while in the latter sharp changes exist across the interface be- tween soil types. To complicate the estimation process, remotely sensedmeasurements often exhibit regions of missing observations due to occlusions such as cloud cover. Similarly, water surface and ground-based sensors usually provide only an incomplete set of measurements. Traditional methods of interpolation and smoothing for estimating the fields from such potentially sparse measurements often blur across the discontinuities in the field
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