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| Titel |
Calculation of ionospheric plasma density irregularities parameters by using EISCAT measurements for strong scintillation modelling |
| VerfasserIn |
Biagio Forte, Ingemar Häggström, Esa Turunen |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250035575
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| Zusammenfassung |
| Ionospheric plasma density irregularities may cause rapid fluctuations in the intensity and
phase of radio waves propagating through. Usually, scintillation events are modelled in the
diffractive scattering approach which is valid for weak scattering conditions. Some
mathematical tricks help then in reproducing high levels of scintillation, lacking of full
physical meaning. Strong scintillation events are better modelled in the refractive scattering
approach, which includes weak scattering conditions. A few parameters (e.g., spatial
correlation length and drift velocity) are of key importance in understanding which approach
may be correct.
Last year, two EISCAT measurement campaigns have been set up in the framework of
the Trans-National Access programme, in order to infer and calculate all those
parameters useful for numerical modelling of scintillation events. The radar measurement
results are compared with transionospheric radio signals at VHF, UHF, and L band
in order to understand the feasibility and appropriateness of the two approaches. |
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