A virtual mission to estimate discharge using assimilation of high-resolution simulated SWOT Data: initial results over the Ohio river

Delwyn Moller; Kostantinos Andreadis; Ernesto Rodriguez; Xiaoqing Wu; Douglas Alsdorf

doi:10.1117/12.868979

13 October 2010 A virtual mission to estimate discharge using assimilation of high-resolution simulated SWOT Data: initial results over the Ohio river

Delwyn Moller, Kostantinos Andreadis, Ernesto Rodriguez, Xiaoqing Wu, Douglas Alsdorf

Author Affiliations +

Proceedings Volume 7826, Sensors, Systems, and Next-Generation Satellites XIV; 782617 (2010) https://doi.org/10.1117/12.868979
Event: SPIE Remote Sensing, 2010, Toulouse, France

Abstract

In this paper we present a framework for a virtual mission (VM) that 1) models the basin-wide physical and hydraulic processes of a chosen study region, namely the Ohio river basin, 2) samples those processes with a high fidelity SWOT simulation to deliver realistic high-resolution temporally subsampled, spatially dense interferograms, 3) reconstructs the water surface elevation from the synthetic interferometric measurement. This is part of an ongoing effort where the elevation measurements, as during the SWOT mission, will be integrated into a data assimilation framework to estimate discharge. We present results from the key elements of the VM Ohio basin configuration including the study region extent and hydrodynamics model setup. Furthermore, an example of georeferenced reconstructed heights derived from the SWOT instrument simulator over the Ohio modeled region is given. These results illustrate the effects of random (thermal and fading/speckle) noise of the height estimates as well as explicitly evaluating the effects of topographic layover. In the near future the hydrodynamic modeling and synthetic SWOT acquisitions over the region will be run for several "virtual" months to provide data to support the discharge estimation algorithm development in preparation for SWOT.

Citation Download Citation

Delwyn Moller, Kostantinos Andreadis, Ernesto Rodriguez, Xiaoqing Wu, and Douglas Alsdorf "A virtual mission to estimate discharge using assimilation of high-resolution simulated SWOT Data: initial results over the Ohio river", Proc. SPIE 7826, Sensors, Systems, and Next-Generation Satellites XIV, 782617 (13 October 2010); https://doi.org/10.1117/12.868979

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