Comparison of the orientation of small-scale electron density irregularities and F region plasma flow direction

• Published in: Annales Geophysicae
• Main Authors: Tereshchenko, E. D., Khudukon, B. Z., Kozlova, M. O., Evstafiev, O. V., Nygrén, T., Rietveld, M. T., Brekke, A.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer Verlag 2000
• Subjects: article; Verlagsveröffentlichung; EISCAT
• Online Access: https://doi.org/10.1007/s00585-000-0918-9; https://noa.gwlb.de/receive/cop_mods_00036712; https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036666/angeo-18-918-2000.pdf; https://angeo.copernicus.org/articles/18/918/2000/angeo-18-918-2000.pdf

Results are shown from an experimental campaign where satellite scintillation was observed at three sites at high latitudes and, simultaneously, the F region plasma flow was measured by the nearby EISCAT incoherent scatter radar. The anisotropy parameters of field-aligned irregularities are determined from amplitude scintillation using a method based on the variance of the relative logarithmic amplitude. The orientation of the anisotropy in a plane perpendicular to the geomagnetic field is compared with the direction of F region plasma flow. The results indicate that in most cases a good agreement between the two directions is obtained. Key words: Ionosphere (auroral ionosphere; ionospheric irregularities)