Scintillation and EISCAT investigations of gradient-drift irregularities in the high latitude ionosphere

Details Scintillation and EISCAT investigations of gradient-drift irregularities in the high latitude ionosphere Scintillation and EISCAT investigations of gradient-drift irregularities in the high latitude ionosphere

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jatp...51..241k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 51, April 1989, p. 241-247. Research supported by SERC.

Physics

5

Eiscat Radar System (Europe), Ionospheric Disturbances, Satellite Transmission, Scintillation, F Region, Ionospheric Electron Density, Navigation Satellites

Scientific paper

Scintillation observations of VHF satellite transmissions provide information on the occurrence of ionospheric irregularities with horizontal scale sizes in the subkilometer regime. Although incapable of sufficient resolution to observe such irregularites, incoherent scatter radar yields measurements of ionospheric plasma parameters on a larger scale. Thus, coordinated observations using both techniques allow a study of the mechanisms responsible for the production and growth of the small scale irregularities. Results are presented of scintillation measurements made at Kiruna in northern Sweden using transmissions from satellites in the Navy Navigational Satellite System (NNSS) at times when the European incoherent scatter radar facility (EISCAT) was operating in a meridional scan common program mode. Radar measurements of plasma drift velocity indicate that the small scale structures could have originated from destabilization of the electron density gradients by the E x B gradient-drift instability mechanism.

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