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Assimilation of GIRO Data into a Real-Time IRIIncreasingly accurate and detailed global 3-D specification of the Earth's space plasma environment is required to further understand its intricate organization and behavior. For a long time space physics and aeronomy research has been data starved due to the great variety of natural time scales involved in the plasma phenomenology. We have started developing a new approach to the global ionospheric specification called Real-Time Assimilative Mapping (RTAM). The IRI-RTAM will use data from the Global Ionospheric Radio Observatory (GIRO) to smoothly transform International Reference Ionosphere's (IRI's) background empirical maps of the ionospheric characteristics to match the observations. Such empirical assimilative modeling will provide a high-resolution, global picture of the ionospheric response to various short-term events observed during periods of storm activity or the impact of gravity waves coupling the ionosphere to the lower atmosphere, including timelines of the vertical restructuring of the plasma distribution. It will also contribute to the challenging task of providing a rapid insight into the temporal and spatial space weather development using the real-time GIRO data streams. The new assimilation technique "updates" the IRI electron density distribution while preserving the overall integrity of IRI s typical ionospheric feature representations. The technique adjusts the coefficients of the spherical/diurnal expansions used by the CCIR and URSI-88 model to obtain the global sub-peak electron density distribution. The set of global corrected coefficients can be generated as frequently as every 15 min and easily disseminated using a single real-time RTAM server operated by GIRO.
Document ID
20120013750
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Galkin, I. A.
(Massachusetts Univ. Lowell, MA, United States)
Reinisch, B. W.
(Massachusetts Univ. Lowell, MA, United States)
Huang, X.
(Massachusetts Univ. Lowell, MA, United States)
Bilitza, D.
(George Mason Univ. Fairfax, VA, United States)
Date Acquired
August 26, 2013
Publication Date
April 17, 2012
Publication Information
Publication: Radio Science
Volume: 47
Subject Category
Geophysics
Report/Patent Number
GSFC.JA.6517.2012
Funding Number(s)
CONTRACT_GRANT: NNX09AJ746
CONTRACT_GRANT: FA8718-06-C-0072
Distribution Limits
Public
Copyright
Other

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