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Application of Stochastic Inversion in Auroral Tomography : Volume 14, Issue 11 (30/11/-0001)

By Nygrén, T.

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Book Id: WPLBN0003979572
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Application of Stochastic Inversion in Auroral Tomography : Volume 14, Issue 11 (30/11/-0001)  
Author: Nygrén, T.
Volume: Vol. 14, Issue 11
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Markkanen, M., Lehtinen, M., Kaila, K., & Nygrén, T. (-0001). Application of Stochastic Inversion in Auroral Tomography : Volume 14, Issue 11 (30/11/-0001). Retrieved from

Description: Department of Physical Sciences, University of Oulu, FIN-90570 Oulu, Finland. A software package originally developed for satellite radio tomography is briefly introduced and its use in two-dimensional auroral tomography is described. The method is based on stochastic inversion, i.e. finding the most probable values of the unknown volume emission rates once the optical measurements are made using either a scanning photometer or an auroral camera. A set of simulation results is shown for a different number and separations of optical instruments at ground level. It is observed that arcs with a thickness of a few kilometers and separated by a few tens of kilometers are easily reconstructed. The maximum values of the inversion results, however, are often weaker than in the model. The most obvious reason for this is the grid size, which cannot be much smaller than the arc thickness. The grid necessarily generates a spatial averaging effect broadening the arc cross-sections and reducing the peak values. Finally, results from TV-camera observations at Tromsø and Esrange are shown. Although these sites are separated by more than 200 km, arcs close to Tromsø have been successfully reconstructed.

Application of stochastic inversion in auroral tomography


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