Results: **25**

#### An oscillatory excited molecular nitrogen in the **ionospheric** plasma

The mathematical model for research of the non-stationary processes proceeding in **ionosphere** and plasmasphere of Earth is presented. This model allows to investigate dynamics of interaction charged and neutral components of **ionospheric** plasma, and also to reveal a contribution of various processes to formation of **ionosphere**. Results ...

#### Effects of multidimensionality in theoretical models of middle-latitude F-region of **ionosphere**

Check of working capacity of multidimensional non-stationary model of F-region of **ionosphere** on the basis of comparison of the given modeling calculations and the data received from empirical model IRI is spent.
1.
Латышев К. С., Зинин Л. В., Ишанов С. А.
Математическое моделирование ...

#### A model of mid-scale irregularities of the low-latitude Earth **ionosphere** : evaluations of a non-linear correction method for the Z-scheme

A nonlinear correction of the finite-differential scheme for solution of the cross convection-diffusion equations within models of the Rayleigh — Taylor instability in the equatorial region of the Earth **ionosphere** is considered. For test problems the experimental value of the approximation order of the offered method of non-linear correction of the finite-differential scheme for different types of limiters is received numerically.
1. Гайдуков ...

#### A high resolution model of the equatorial F-layer of **ionosphere**

This article formulates the problem of simulating extreme processes in the Earth's low-latitude **ionosphere** and describes the model equation imple-mentation methods based on an electrodynamically coherent mathematical mo-del of the equatorial F-layer of the **ionosphere**.
1. Доронина Е. Н., Намгаладзе А. А., Гончаренко ...

#### The altitude influence of the transmitter location on the formation of the short radio wave traces in the **ionosphere**

The article presents calculations for ray traces and the absorption of short radio waves in the **ionosphere**. The multi-jump traces are examined
on the basis of the altitude of the transmitter and geophysical conditions.
1
.
Namgaladze
А.
A
.,
Martynenko
O
.
V
.,
Volkov
М.
A
.,
Namgaladze
A
.
N
.,
Yurik
R
.
Yu
.
High-latitude ...

#### Dynamical anthropogenic perturbations of ionosphere-magnetospheric plasma

.... H., St.—Maurice J.
Dissociative recombination of
N2, O2
and NO+
// J. Geophys. Res. 2004. V
ol
. 109.
№
A3. P. A03302.
5.
Barakat A. R., Schunk R. W., Moore T. E., Waite J. H.
Ion escape fluxes from the terrestrial high-latitude **ionosphere** // Ibid. 1987. Vol
. 92, № 11.
P
. 12255—12266.
6.
Кринберг Н. А., Тащилин А. В.
Ионосфера и плазмосфера. М., 1984.
7.
Елизарова Т. Г., Четверушкин Б. Н.
Об одном ...

#### Simulating of non-stationary processes in the **ionospheric** plasma

... the main processes of chemical kinetics, ambipolar diffusion, influence of horizontal neutral wind and plasma heating by superthermal electrons. The article presents numerical calculation results of variations of charged particles concentration in the **ionosphere** and the plasmasphere. The comparative analysis of various hydrodynamic approximations for the description of the **ionospheric** and the magnetospheric plasma is carried out. It is made on the basis of the numerical solution of the system of equations ...

#### Numerical simulation of the **ionospheric** effects of geomagnetic storm on 2—3 may 2010 at the HF radio wave propagation in the low-latitude region

... the description of inhomogeneous anisotropic medium in the simulation of radio wave propagation. It is shown that the results obtained with joint using GSM TIP model and radio wave propagation model adequately describe HF radio paths in the Earth's **ionosphere** in quiet conditions and at the recovery phase of geomagnetic storm.
1. Котова Д. С., Клименко М. В., Клименко В. В. и др. Численное моделирование распространения радиоволн ...

#### An instability of the equatorial F-layer of the **ionosphere** under conditions of alternating electric fields

The results of numerical simulation of Rayleigh-Taylor instability under conditions of alternating electric fields on the basis of electrodynamically consistent mathematical model of the Equatorial F-layer of the **ionosphere**.
1. Грэд Г. О кинетической теории разреженных газов // Механика. 1952. Вып. 4. С. 71—79 ; Вып. 5. С. 61—96.
2. Гершман Б. Н. Динамика ионосферной плазмы....

#### Investigation of distortions of the chirp signals in the neighborhood of critical frequencies of **ionospheric** plasma

Numerical experiments are performed to investigate the dispersion distortions of chirp pulses propagating in the **ionosphere** with taking the three-dimensional non-uniformity, anisotropy, and dispersion of **ionosphere** in dependence on geophysical conditions into account. Propagation, absorption,and the time delay of ordinary and nonordinary waves are analased.
1. ...

#### Teoretical nonstationary two-dimensional modal with altitude-longitudinal variations of **ionosphere** parameters

By means of mathematical two-dimensional nonstationary model mechanisms of formation of longitudinal effect in a middle-latitude **ionosphere** are probed and is shown that one of main engines is the thermosphere wind in combination with earth magnetic field geometry. Model calculations of dependence of longitudinal effects in middle-latitude F-area from levels of geomagnetic and solar ...

#### Results of simulating of instabilities of the equatorial F-layer of the **ionosphere**

The results of numerical experiments of the dynamic **ionospheric** bubbles in the equatorial F-region are described. Generation bubbles by gravitational waves is investigated. A trigger mechanism of generation bubbles in F-layer by clouds in E-layer is studied. Influences of a conductivity of the E-layer ...

#### Non-stationary polar wind in presence of magnetosphere convection

Time-depended hydrodynamic model TUBE 7 is used for modeling of field-aligned motions and temperature of polar **ionosphere** ions taking into account magnetosphere convection. It was shown tube geometry changing have a great influence on basic parameters of polar magnetosphere thermal plasma.
1.
Banks P. M., Holzer
Т
.
Е
.
The polar wind // J. Geophys. ...

#### The **ionosphere** effects from Poincare waves in the atmosphere

The article focuses on the possibilities of physical interpretation of global **ionosphere** agitations in the period of elevated geomagnetic activity.
The authors offer a physical interpretation of this phenomenon based on the assumption about the agitation of planetary Poincare waves in atmosphere. The analysis of the space-time ...

#### Influence of solar and geomagnetic activity on the diurnal variations of NmF2 in winter in the middle latitudes

... thermospheric composition: a modelling study // Ann. Geophysic. 1999. Vol. 17. P. 794—805.
3. Ratovsky K. G., Oinats A. V., Medvedev A. V. Similitaries and differences between regular variations of F2-layer parameters of the polar and midlatitude **ionosphere** in East Siberian sector // Solar-Terrestrial Physics. 2015. Vol. 1, № 2. P. 70—79.
4. Lei J., Liu L., Wan W. and Zhang S.-R. Variations of electron density based on long-term incoherent scatter radar and ionosonde measurements over Millstone ...

#### Use of the Z-scheme in an Rayleigh-Taylor instability model

A nonlinear finite-differential scheme for solution of convection-diffusion equation in the field of models of Rayleigh-Taylor instability in the equatorial region of Earth **ionosphere** is considered. For test tasks monotony of the constructed scheme is in number confirmed. Experimental value of an order of approximation of the offered method of nonlinear correction of the finitedifferential scheme is received.
1. Гайдуков ...

#### GPS/GLONASS-tomography of **ionosphere**

The article tackles the problem of the reconstruction of **ionospheric** electron density height structure by means of GPS/GLONASS systems.
1
. Austen J.
R., Franke S.
J., Liu C.
H.
//
Radio Science.
1988. 23.
Р
. 299.
2.
Raymund T.
D., Austen J.
R., Franke S.
J. et al.
//
Radio
Science....

#### Spectral characteristics of atmospheric disturbances at middle latitudes during geomagnetic storms

The paper discusses the possibility of physical interpretation of the global **ionosphere** disturbances during geomagnetic storms, and after them, based on Poincare waves excited in the atmosphere under such conditions. The spectrum of the diurnal variations TEC perturbations were obtained for the midlatitude stations located in ...

#### Computing experiment for simulating altitude-latitude distributions of **ionospheric** parameters

A mixed derivatives influence in during three-dimensional simulation of **ionosphere** by difference methods is considered.
1.
Ишанов С. А., Клевцур С. В.
Математическое моделирование ионосферы с учетом ее трехмерной неоднородности // ...

#### Effects of storm events on the upper atmos-phere in the Baltic sea

The paper presents the results of observations the **ionospheric** parameters in Kaliningrad (54° N, 20° E) during a meteorological storm in the Baltic sea on October 2018. The analysis of **ionospheric** variations showed the increase in the total electron content reached 20 % relative to the averaged values,...

#### Estimation of parameters of of the **ionospheric** signal

The technique of an estimation of parameters of a dual-beam **ionospheric** signal is presented by a method of the maximum credibility. Results of modeling calculations and results of calculations of real **ionospheric** signals on line Moscow — Kaliningrad are resulted.
1. Перов А. И. Статистическая ...

#### Model of **ionospheric** signal with the multiplicate hindrance

It is shown that unsteadiness parameters of components of the **ionospheric** signal leads to multiplicative noise. It largely affects the reliable data when receiving **ionospheric** signals. The estimation of the variance of the amplitudes for the reception of **ionospheric** signals with multiplicative noise. The results ...

#### Research of polarising structure **ionospheric** signals Investigation of polarization structure of **ionospheric** signal

Results of analysis of the polarization structure of **ionospheric** signals. The orthogonally circular basis for assessing the polarization characteristics is used. The Pockels effect is experimentally verified.
1.
Пахотин В. А.
Поляризация радиоволн КВ диапазона ...

#### Modeling of H Thermal Ions Measurements onboard Charged Satellite Taking into Account Anisotropy of Temperature

The mass-spectrometer model of thermal **ionospheric** ions measurements was considered in case of charged satellite. Hyperboloid device characteristics onboard Interball-2 satellite was used for mathematical model of measurements. It was shown that angular ion distribution function changed due ...

#### Method of processing of the **ionospheric** signals pulse

The new method of processing of pulse **ionospheric** signals is presented. It is based on positions of the theory of optimum reception. However these positions are applied to difference to the equation received after transformation of the accepted message. The theory of a method of processing ...