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dc.contributor.authorNorberg, Johannes
dc.contributor.authorVirtanen, Ilkka I.
dc.contributor.authorRoininen, Lassi
dc.contributor.authorVierinen, Juha
dc.contributor.authorOrispää, Mikko
dc.contributor.authorKauristie, Kirsti
dc.contributor.authorLehtinen, Markku S.
dc.date.accessioned2017-07-10T17:34:04Z
dc.date.available2017-07-10T17:34:04Z
dc.date.issued2016-04
dc.date.submitted2016-03
dc.identifier.issn1867-8548
dc.identifier.urihttp://hdl.handle.net/1721.1/110597
dc.description.abstractWe validate two-dimensional ionospheric tomography reconstructions against EISCAT incoherent scatter radar measurements. Our tomography method is based on Bayesian statistical inversion with prior distribution given by its mean and covariance. We employ ionosonde measurements for the choice of the prior mean and covariance parameters and use the Gaussian Markov random fields as a sparse matrix approximation for the numerical computations. This results in a computationally efficient tomographic inversion algorithm with clear probabilistic interpretation. We demonstrate how this method works with simultaneous beacon satellite and ionosonde measurements obtained in northern Scandinavia. The performance is compared with results obtained with a zero-mean prior and with the prior mean taken from the International Reference Ionosphere 2007 model. In validating the results, we use EISCAT ultra-high-frequency incoherent scatter radar measurements as the ground truth for the ionization profile shape. We find that in comparison to the alternative prior information sources, ionosonde measurements improve the reconstruction by adding accurate information about the absolute value and the altitude distribution of electron density. With an ionosonde at continuous disposal, the presented method enhances stand-alone near-real-time ionospheric tomography for the given conditions significantly.en_US
dc.description.sponsorshipAcademy of Finland (285474)en_US
dc.language.isoen_US
dc.publisherCopernicus GmbHen_US
dc.relation.isversionofhttp://dx.doi.org/10.5194/amt-9-1859-2016en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourceCopernicus Publicationsen_US
dc.titleBayesian statistical ionospheric tomography improved by incorporating ionosonde measurementsen_US
dc.typeArticleen_US
dc.identifier.citationNorberg, Johannes et al. “Bayesian Statistical Ionospheric Tomography Improved by Incorporating Ionosonde Measurements.” Atmospheric Measurement Techniques 9.4 (2016): 1859–1869.en_US
dc.contributor.departmentHaystack Observatoryen_US
dc.contributor.mitauthorVierinen, Juha
dc.relation.journalAtmospheric Measurement Techniquesen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsNorberg, Johannes; Virtanen, Ilkka I.; Roininen, Lassi; Vierinen, Juha; Orispää, Mikko; Kauristie, Kirsti; Lehtinen, Markku S.en_US
dspace.embargo.termsNen_US
mit.licensePUBLISHER_CCen_US


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