Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements
We 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 p...
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| Formaat: | Artikel |
| Taal: | en_US |
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Copernicus GmbH
2017
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| Online toegang: | http://hdl.handle.net/1721.1/110597 |
| _version_ | 1826198045717430272 |
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| author | Norberg, Johannes Virtanen, Ilkka I. Roininen, Lassi Vierinen, Juha Orispää, Mikko Kauristie, Kirsti Lehtinen, Markku S. |
| author2 | Haystack Observatory |
| author_facet | Haystack Observatory Norberg, Johannes Virtanen, Ilkka I. Roininen, Lassi Vierinen, Juha Orispää, Mikko Kauristie, Kirsti Lehtinen, Markku S. |
| author_sort | Norberg, Johannes |
| collection | MIT |
| description | We 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. |
| first_indexed | 2024-09-23T10:58:00Z |
| format | Article |
| id | mit-1721.1/110597 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:58:00Z |
| publishDate | 2017 |
| publisher | Copernicus GmbH |
| record_format | dspace |
| spelling | mit-1721.1/1105972022-10-01T00:18:14Z Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements Norberg, Johannes Virtanen, Ilkka I. Roininen, Lassi Vierinen, Juha Orispää, Mikko Kauristie, Kirsti Lehtinen, Markku S. Haystack Observatory Vierinen, Juha We 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. Academy of Finland (285474) 2017-07-10T17:34:04Z 2017-07-10T17:34:04Z 2016-04 2016-03 Article http://purl.org/eprint/type/JournalArticle 1867-8548 http://hdl.handle.net/1721.1/110597 Norberg, Johannes et al. “Bayesian Statistical Ionospheric Tomography Improved by Incorporating Ionosonde Measurements.” Atmospheric Measurement Techniques 9.4 (2016): 1859–1869. en_US http://dx.doi.org/10.5194/amt-9-1859-2016 Atmospheric Measurement Techniques Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf Copernicus GmbH Copernicus Publications |
| spellingShingle | Norberg, Johannes Virtanen, Ilkka I. Roininen, Lassi Vierinen, Juha Orispää, Mikko Kauristie, Kirsti Lehtinen, Markku S. Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| title | Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| title_full | Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| title_fullStr | Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| title_full_unstemmed | Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| title_short | Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| title_sort | bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements |
| url | http://hdl.handle.net/1721.1/110597 |
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