The topside ionosphere scale height extracted from two empirical models are compared in the paper. The Topside Sounder Model (TSM) provides directly the scale height (H T ), while the incoherent scatter radar ionospheric model (ISRIM) provides electron density profiles and its scale height (H R ) is determined by the lowest gradient in the topside part of the profile. H T and H R are presented for 7 ISR locations along with their dependences on season, local time, solar flux F10.7, and geomagnetic index ap. Comparison reveals that H T values are systematically lower than respective H R values as the average offset for all 7 stations is 55 km. For the midlatitude stations Arecibo, Shigaraki, and Millstone Hill this difference is reduced to 43 km. The range of variations of H R is much larger than that of H T , as the H T range overlaps the lower part of the H R range. Dependences on ap, DoY and LT are much stronger in the ISRIM than in TSM. This results in much larger values of H R at higher ap. Diurnal amplitude of H R is much larger than that of H T , with large maximum of H R at night. The present comparison yields the conclusion that the ISR measurements provide steeper topside Ne profiles than that provided by the topside sounders. © 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
CITATION STYLE
Marinov, P., Zhang, S., & Kutiev, I. (2013). Comparison of topside ionosphere scale height modeled by the Topside Sounder Model and incoherent scatter radar ionospheric model. Advances in Space Research, 52(10), 1717–1725. https://doi.org/10.1016/j.asr.2013.03.008
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