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| Titel |
A new inversion algorithm for backscatter ionogram and its experimental validation |
| VerfasserIn |
J. J. Zhao, C. Zhou, G. B. Yang, C. H. Jiang, S. S. Chang, P. Zhu, X. D. Gu, B. B. Ni, Z. Y. Zhao |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 32, no. 4 ; Nr. 32, no. 4 (2014-04-28), S.465-472 |
| Datensatznummer |
250121054
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| Publikation (Nr.) |
 copernicus.org/angeo-32-465-2014.pdf |
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| Zusammenfassung |
| Oblique backscatter sounding is a powerful tool for detecting and monitoring
the ionosphere continuously at a remote distance. High-frequency (HF)
backscatter ionograms provide the amplitudes of backscatter signals with
respect to group path or time delay against operating frequency. Application
of inversion algorithm to a backscatter ionogram can extract useful
information regarding the ionospheric electron density along the propagation
paths. The present study proposes a new inversion algorithm on basis of
simulated annealing method to acquire the leading edge of sweep-frequency
ionogram, which is subsequently validated by ionospheric vertical sounding
data. Quantitative comparisons between the vertical sounding measurements and
the inversion results obtained from oblique backscatter sounding indicate
that the new algorithm enables us to overcome the instability issue that
traditional inversion algorithm faces and output reliable information of
ionospheric inversion with satisfactory efficiency, thus providing a robust
alternative for ionospheric detection based on oblique backscatter ionograms
especially when the ionosphere is calm with slow changes. |
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