Determination of drift velocity and anisotropy of irregularities in the auroral ionosphere using radio source scintillation

Details Determination of drift velocity and anisotropy of irregularities in the auroral ionosphere using radio source scintillation Determination of drift velocity and anisotropy of irregularities in the auroral ionosphere using radio source scintillation

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jatp...56...93k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 56, no. 1, p. 93-102

Astronomy and Astrophysics

Astronomy

1

Auroral Ionization, Earth Ionosphere, Electric Fields, Ionospheric Drift, Radio Sources (Astronomy), Scintillation, Anisotropy, Data Correlation, Diffraction Patterns, Ground Truth, Mathematical Models, Propagation Velocity, Radar Measurement, Wave Propagation

Scientific paper

In this paper an improved technique is introduced to determine the drift velocity and anisotropy parameters of ionospheric irregularities from observations of radio source scintillation by a set of spaced receivers on the ground level. The method is capable of using the information in the received signals more completely than the previous methods do and therefore it is also expected to give more accurate results. This is achieved by choosing a set of several correlation values and determining the points where the various auto- and cross-correlation functions intersect these levels. Using the intersection points and maximum points of the cross-correlation functions a greater number of equations are obtained than in the previous methods which use only a few characteristic points (like maxima and mutual intersections) of the correlation functions. Scintillation measurements using a receiving system located at high latitudes on the Kola peninsula have been carried out. Examples of results from the present and previous techniques are shown and the improvement gained by increasing the number of equations is demonstrated. The new method is found to be more stable than the previous ones and to be able to deal with situations where the previous techniques completely fail. Future possibilities to carry out simultaneous measurements, e.g. with the European Incoherent Scattering Scientific Association (EISCAT) incoherent scatter radar system and to compare the results are discussed.

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