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A study of aspect angle effects in the E ‐region irregularity velocity using multi‐point electric field measurements
Author(s) -
Makarevich R. A.,
Senior A.,
Koustov A. V.,
Uspensky M.,
Honary F.,
Dyson P. L.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl027740
Subject(s) - electric field , point (geometry) , field (mathematics) , geology , geophysics , physics , geodesy , optics , computational physics , geometry , mathematics , quantum mechanics , pure mathematics
E ‐region irregularity velocity measured by the STARE Norway VHF radar is considered as a function of magnetic aspect angle α and EISCAT‐derived electron drift velocity at 7 locations with α between 0.38° and 2.64°. It is shown that the irregularity line‐of‐sight (l‐o‐s) velocity normalized to the electron velocity component V e 0 comp exhibits a decrease with an increasing aspect angle for V e 0 comp exceeding 500 m/s. The rate of velocity decrease is greater than those reported previously and is close to that predicted by the linear theory of electrojet irregularities without assuming anomalously large collision frequencies.