IRI-2012 MODEL ADAPTABILITY ESTIMATION FOR AUTOMATED PROCESSING OF VERTICAL SOUNDING IONOGRAMS

V. D. Nikolaeva, M. V. Rybakov, A. L. Kotikov, V. K. Koshelevsky


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Abstract

The paper deals with possibility of IRI-2012 global empirical model applying to the vertical sounding of the ionosphere semiautomatic data processing. Main ionosphere characteristics from vertical sounding data at IZMIRAN Voeikovo station in February 2013 were compared with IRI-2012 model calculation results. 2688 model values and 1866 real values of f0F2, f0E, hmF2, hmE were processed. E and F2 layers critical frequency (f0E, f0F2) and the maximum altitudes (hmF2, hmE) were determined from the ionograms. Vertical profiles of the electron concentration were restored with IRI-2012 model by measured frequency and height. The model calculation was also made without the inclusion of the real vertical sounding data. Monthly averages and standard deviations (σ) for the parameters f0F2, f0E, hmF2, hmE for each hour of the day were calculated according to the vertical sounding and model values. Model applicability conditions for automated processing of ionograms for subauroral ionosphere were determined. Initial IRI-2012 model can be applied in the sub-auroral ionograms processing at daytime with undisturbed conditions in the absence of sporadic ionization. In this case model calculations can be adjusted by the near-time vertical sounding data. IRI-2012 model values for f0E (in daytime) and hmF2 can be applied to reduce computational costs in the systems of automatic parameters search and preliminary determination of the searching area range for the main parameters. IRI-2012 model can be used for a more accurate approximation of the real data series in the absence of the real values. In view of sporadic ionization, ionosphere models of the high latitudes must be applied with corpuscular ions formation unit.


Keywords: vertical sounding of the ionosphere, ionogram, empiric model, critical frequency, maximum height

References

1. Гришенцев А.Ю., Коробейников А.Г. Проектирование и технологическая подготовка сетей станций вертикального зондирования ионосферы // Научно-технический вестник информационных техноло- гий, механики и оптики. 2013. № 3 (85). С. 61–66.

2. Schunk R.W., Soika J.J. Ionospheric models // Modern Ionospheric Science / Eds H. Kohl, R. Rüster, K. Schlegel. Katlenburg-Lindau, Germany: European Geophysical Society, 1996. P. 181–215.

3. Namgaladze A.A., Korenkov Yu.N., Klimenko V.V., Karpov I.V., Bessarab F.S., Surotkin V.A., Glushchenko T.A., Naumova N.M. Global model of the thermosphere-ionosphere-protonosphere system // Pure and Applied Geophysics. 1988. V. 127. N 2–3. P. 219–254.

4. Namgaladze A.A., Namgaladze A.N., Yurik R.Yu. Global modeling of the quiet and disturbed upper atmosphere // Physics and Chemistry of the Earth. 2000. V. 25. N 5–6. P. 533–536.

5. Namgaladze A.N., Evstafiev O.V., Khudukon B.Z., Namgaladze A.A. Model interpretation of the ionospheric F-region electron density structures observed by ground-based satellite tomography at sub-auroral and auroral latitudes in Russia in January-May 1999 // Annales Geophysicae. 2003. V. 21. N 4. P. 1005–1016.

6. Mingalev O.V., Mingaleva G.I., Melnik M.N., Mingalev V.S. Numerical Simulation of the Time Evolution of Small-Scale Irregularities in the F-Layer Ionospheric Plasma // International Journal of Geophysics. 2011. V. 2011. P. 353640-1–353640-8.

7. Sergienko T.I., Ivanov V.E. A new approach to calculate the excitation of atmospheric gases by auroral electron impact // Annales Geophysicae. 1993. V. 11. N 8. P. 717–727.

8. Bilitza D. International Reference Ionosphere 2000 // Radio Science. 2001. V. 36. N 2. P. 261–275.

9. Turunen E., Matveinen H., Tolvanen J., Ranta H. D-region ion chemistry model // STEP Handbook of Ionospheric Models / Ed. R.W. Schunk. Logan: Utah State University, 1996. P. 1–25.

10. Николаева В.Д., Макарова Л.Н., Широчков А.В., Котиков А.Л. Сопоставление результатов расчетов модели IRI-2007 с данными вертикального зондирования и радара некогерентного рассеяния для ав- роральной ионосферы // Proc. of the XXXIV Annual Seminar «Physics of Auroral Phenomena». Apatity, 2011. P. 174–177.

11. Canadian Advanced Digital Ionosonde (CADI). Scientific Instrumentation Ltd. [Электронный ресурс]. Ре- жим доступа: http://www.sil.sk.ca/, свободный. Яз. англ. (дата обращения 17.11.2013).

12. Canadian advanced digital ionosonde. System manuals. Saskatoon, Canada: Scientific instrumentation limited, 2009. 22 p.

13. Архив ионограмм. Институт земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова РАН. Ионосфера и распространение радиоволн [Электронный ресурс]. Режим доступа: http://sphere.izmiran.ru/, свободный. Яз. рус. (дата обращения 17.11.2013).

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