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Comparing different assimilation techniques for the ionospheric F2 layer reconstruction

Gerzen, Tatjana and Minkwitz, David and Schlüter, Stefan (2015) Comparing different assimilation techniques for the ionospheric F2 layer reconstruction. Journal of Geophysical Research: Space Physics, 120, pp. 6901-6913. Wiley. doi: 10.1002/2015JA021067. ISSN 2169-9380.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2015JA021067/pdf


From the applications perspective the electron density is the major determining parameter of the ionosphere due to its strong impact on the radio signal propagation. As the most ionized ionospheric region, the F2 layer has the most pronounced effect on transionospheric radio wave propagation. The maximum electron density of the F2 layer, NmF2, and its height, hmF2, are of particular interest for radio communication applications as well as for characterizing the ionosphere. Since these ionospheric key parameters decisively shape the vertical electron density profiles, the precise calculation of them is of crucial importance for an accurate 3-D electron density reconstruction. The vertical sounding by ionosondes provides the most reliable source of F2 peak measurements. Within this paper, we compare the following data assimilation methods incorporating ionosonde measurements into a background model: Optimal Interpolation (OI), OI with time forecast (OI FC), the Successive Correction Method (SCM), and a modified SCM (MSCM) working with a daytime-dependent measurement error variance. These approaches are validated with the measurements of nine ionosonde stations for two periods covering quiet and disturbed ionospheric conditions. In particular, for the quiet period, we show that MSCM outperforms the other assimilation methods and allows an accuracy gain up to 75% for NmF2 and 37% for hmF2 compared to the background model. For the disturbed period, OI FC reveals the most promising results with improvements up to 79% for NmF2 and 50% for hmF2 compared to the background and up to 42% for NmF2 and 16% for hmF2 compared to OI.

Item URL in elib:https://elib.dlr.de/96819/
Document Type:Article
Title:Comparing different assimilation techniques for the ionospheric F2 layer reconstruction
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:Journal of Geophysical Research: Space Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 6901-6913
Keywords:Data assimilation, Ionospheric F2 layer characteristics, Kalman Filter, Optimal Interpolation, SCM, Reconstruction, Ionosphere
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Gerzen, Tatjana
Deposited On:09 Oct 2015 13:07
Last Modified:06 Nov 2023 09:42

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