Physicochemical model of the auroral ionosphere

Book of Proceedings Tenth Workshop Primorsko, Bulgaria 2019

“…But the I 5577 /I 4278 and I 6300 /I 4278 volume emission rate ratios slightly depend on the precipitating electrons energy flux, Figure 3 shows that. The calculation was made by physicochemical model of auroral ionosphere [Dashkevich et al, 2017]. Hence, the I 5577 /I 4278 ratio is mainly determined by the values of Е 0 and NO density.…”

“…Topic: Data Processing and Modelling 132 1) based on the measured I 6300 /I 4278 ratio, we gain an estimation of characteristic energy Е 0 of the precipitating electron flux ( Figure 5) 2) based on the dependence of the I 5577 /I 4278 ratio on [NO] max for the Е 0 found, we determine the nitric oxide density in the altitude profile maximum (Figure 4a) 3) based on [NO] max gained, we reconstruct the nitric oxide altitude profile using the physicochemical model of the auroral ionosphere [Dashkevich et al, 2017] Approbate the proposed technique of estimating [NO] max in aurora using the data obtained into coordinated rocket-satellite experiment. Presented in [Rees et al, 1977, Sharp, 1978, Sharp et al, 1979 are the results of these measurements of OI 5577Å and 6300 Å intensities and 1NG N 2 + 3914 Å intensity .…”

“…Proceedings of Eleventh Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere" Primorsko, Bulgaria, June 3÷7, 2019 The calculation method A comparison of the different excitation mechanisms of the atoms under consideration was made using the physicochemical model of the polar ionosphere [Dashkevich et al, 2017]. The model allows the calculation of: the altitude concentration profiles for the following ionosphere components:…”

Analyzing Existing Applied Models of the Ionosphere to Calculate Radio Wave Propagation and a Possibility of Their Use for Radar-Tracking Systems. Ii. Domestic Models

“…The fact is that by now the physical processes that determine the behavior of the electron density N e are well known, in any case at heights h ≤ 500-600 km, and there is quite extensive experimental data obtained by radiophysical methods, as well as with missiles and satellites. All this served as the basis for developing a set of theoretical, empirical, semi-empirical ionospheric models of varying complexity and purpose in Russia (USSR) (see, e.g., [Danilov, 1967, 1981, Polyakov et al, 1968Ivanov-Kholodny, Nikolsky, 1969;Danilov, Vlasov, 1973;Gershman, 1974;Ionospheric models 1975;Chavdarov et al, 1975;Gershman et al, 1976;Andriyako et al, 1978;Kozlov et al, 1978Kozlov et al, , 2014Krinberg, 1978;Fatkullin, 1978Fatkullin, , 1982Ivanov-Kholodny, Nusinov, 1979;Namgaladze, 1979;Smirnova, Vlaskov, 1979;Ivanov-Kholodny, Mikhailov, 1980;Mizun, 1980Mizun, , 1983Fat-kullin et al, 1981;Koshelev et al, 1983;Krinberg, Tashchilin, 1984;Bryunelli, Namgaladze, 1988;Zevakina et al, 1990;Chasovitin et al, 1990;Shefov et al, 2006;Bekker et al, 2013Bekker et al, , 2017Lapshin et al, 2016a, b;Pavlov, Pavlova, 2016;Wang Zheng et al, 2017;Dashkevich et al, 2017;Krivolutsky et al, 2017;Bekker, 2018;Deminov, Shubin, 2018;Shubin, Deminov, 2019;Sergeenko, 2019]). It is not our task here to give an overview of published works, and the above list is far to be c...…”

Estimated nitric oxide density in auroras from ground-based photometric data

“…The data were obtained at midnight at observatories of the Polar Geophysical Institute. These estimates were made using a numerical modeling procedure with a timedependent model of the auroral ionosphere [Dashkevich et al, 2017]. It is shown that the NO density in the maximum of the altitude profile is between (1÷3.3)•10 8 cm -3 .…”