Data Assimilation for the Two-Dimensional Ambipolar Diffusion Equation in Earth’s Ionosphere Model
- Authors: Dymnikov V.P.1,2, Kulyamin D.V.1,2, Ostanin P.A.1,3, Shutyaev V.P.1,3
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Affiliations:
- Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences
- Fedorov Institute of Applied Geophysics
- Moscow Institute of Physics and Technology (National Research University)
- Issue: Vol 63, No 5 (2023)
- Pages: 803-826
- Section: МАТЕМАТИЧЕСКАЯ ФИЗИКА
- URL: https://journals.rcsi.science/0044-4669/article/view/136138
- DOI: https://doi.org/10.31857/S0044466923050101
- EDN: https://elibrary.ru/GFURSG
- ID: 136138
Cite item
Abstract
The problem of variational data assimilation for the INM RAS two-dimensional diffusion model of the Earth’s ionosphere F region is considered. Total integral electron contents along given paths are used as observation data. The general statement of the problem in differential form is formulated, and its solvability is analyzed. Based on a regularized statement, an iterative algorithm for solving the assimilation problem is constructed, and its convergence is demonstrated. A finite-dimensional approximation is constructed, the numerical solution of the problem is implemented, and the stability and convergence of the difference scheme are proved. The quality of the reconstruction of electron concentration fields is examined in test numerical experiments. It is shown that a weakly perturbed solution is reconstructed with acceptable accuracy for both stationary and evolutionary statements in the case of vertical and slant integration paths.
About the authors
V. P. Dymnikov
Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences; Fedorov Institute of Applied Geophysics
Email: ostanin.pavel@phystech.edu
119333, Moscow, Russia; 129128, Moscow, Russia
D. V. Kulyamin
Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences; Fedorov Institute of Applied Geophysics
Email: ostanin.pavel@phystech.edu
119333, Moscow, Russia; 129128, Moscow, Russia
P. A. Ostanin
Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences; Moscow Institute of Physics and Technology (National Research University)
Email: ostanin.pavel@phystech.edu
119333, Moscow, Russia; 141701, Dolgoprudnyi, Moscow oblast, Russia
V. P. Shutyaev
Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences; Moscow Institute of Physics and Technology (National Research University)
Author for correspondence.
Email: ostanin.pavel@phystech.edu
119333, Moscow, Russia; 141701, Dolgoprudnyi, Moscow oblast, Russia
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