Journal cover Journal topic
Annales Geophysicae An open-access journal of the European Geosciences Union
Ann. Geophys., 17, 508-518, 1999
https://doi.org/10.1007/s00585-999-0508-4
© European Geosciences Union 1999
 
30 Apr 1999
Anisotropy of ionospheric irregularities determined from the amplitude of satellite signals at a single receiver
E. D. Tereshchenko1, B. Z. Khudukon1, M. O. Kozlova1, and T. Nygrén2 1Polar Geophysical Institute, 15 Khalturina, 183010 Murmansk, Russia
2Department of Physical Sciences, University of Oulu, FIN-90570 Oulu, Finland
Abstract. A new method of determining the anisotropy parameters of small-scale irregularities in the ionospheric F region is presented and experimental results are shown. The method is based on observations of amplitude fluctuations of radio waves transmitted by satellites flying above the F region. In practice, Russian navigational satellites are used and both the amplitude and the phase of the received signal is measured on the ground level. The method determines both the field-aligned anisotropy and the field-perpendicular anisotropy and orientation of the spatial spectrum of the irregularities, assuming that the contours of constant power have an elliptic shape. A possibility of applying the method to amplitude tomography is also discussed. Using a chain of receivers on the ground level, one could locate the regions of small-scale irregularities as well as determine their relative intensities. Then the large-scale background structures could be mapped simultaneously by means of ordinary ray tomography using the phase observations, and therefore the relations of small-scale and large-scale structures could be investigated.

Key words. Ionosphere (auroral ionosphere; ionospheric irregularities; instruments and techniques)


Citation: Tereshchenko, E. D., Khudukon, B. Z., Kozlova, M. O., and Nygrén, T.: Anisotropy of ionospheric irregularities determined from the amplitude of satellite signals at a single receiver, Ann. Geophys., 17, 508-518, https://doi.org/10.1007/s00585-999-0508-4, 1999.
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