Forecasting low-latitude radio scintillation with 3-D ionospheric plume models: 2. Scintillation calculation

Details Forecasting low-latitude radio scintillation with 3-D ionospheric plume models: 2. Scintillation calculation Forecasting low-latitude radio scintillation with 3-D ionospheric plume models: 2. Scintillation calculation

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11503307r&link_type=abstract

Journal of Geophysical Research, Volume 115, Issue A3, CiteID A03307

Physics

6

Ionosphere: Modeling And Forecasting, Ionosphere: Ionospheric Irregularities, Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Dynamics, Radio Science: Ionospheric Physics (1240, 2400)

Scientific paper

A three-dimensional model has been developed for the plasma plumes caused by interchange instabilities in the low-latitude ionosphere to describe the structure and extent of the radio scintillation generated by turbulence around and within the plumes. With the inclusion of the processes that determine the transport of plasma parallel to the geomagnetic field lines as well as transverse to them, the model can predict the extent in latitude of the plumes and their scintillation. Diagnostics presented here include illustrations of the spectral density of the density irregularities that develop within the plumes. An extrapolation of the density irregularity spectrum down into the wavelength regime effective for radio wave scattering permits a phase screen calculation of the amplitude scintillation caused by the plumes. The scintillation produced by the model has much the same character as measurements of scintillation do in terms of the time and rate of onset of scintillation, duration, and latitudinal extent.

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