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Results: 41

• 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 ...

• Complex of equipment for reception of ionospheric signals

  The complex of equipment developed for reception and processing of ionospheric signals is presented. The structure of pulse ionospheric signals received on a line Moscow — Kaliningrad is shown. Results of modeling researches of a method of processing of ionospheric signals are resulted. 1. Перов А. И. Статистическая ...

• Ionospheric station of vertical sounding of an ionosphere «Vector»

  The structure of station of vertical sounding "Vector" and results of correlation data processing is presented. For vertical sounding of an ionosphere the difficult signal in the form of the М sequence, containing 16 positions is used. Ways of further modernization of station are shown. Them treat expansion of opportunities of determination of parameters of signals at twofold reflection ...

• 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 ...

• 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 ...

• 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 ...

• 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 ...

• 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 ...

• The dynamics of ground-level aerosol lidar observation in Kaliningrad

  The paper presents an analysis of the spectra of atmosphere aerosol variations and variations Total Electron Content in the ionosphere (TEC). Monitoring of atmospheric aerosol performed with using of the two-wavelength (532, 1064 nm) atmospheric lidar (LSA-2S). Ionospheric TEC parameter determined from the observation of the navigation satellites signals GLONASS (Leica1200)....

• 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 ...

• The features of electron density behavior in the ionosphere-plasmasphere system above equatorial station Jicamarca in the end of September 2011

  We present the analysis of the ionosonde and incoherent scatter radar (ISR) data of ionospheric parameters over Jicamarca (Peru) in quiet conditions and during geomagnetic storms on 22—29 September 2011. According to ISR data the estimation of the ionospheric contribution to the Total Electron Content (TEC) was carried out. These observation ...

• 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 // ...

• 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 ...

• 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. ...

• 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 ...

• Development an Rayleigh-Taylor instability in the equatorial ionosphere from stochastic ionosphere irregularities

  Processes of development of instability of Rayleigh-Taylor in the equatorial region of the ionosphere from accidentally given small perturbations of lower part of F-layer of the ionosphere 1. Гершман Б. Н, Ерухимов Л. М., Яшин Ю. Я. Волновые явления в ионосфере и космической плазме....

• Use of difficult signals at vertical sounding of an ionosphere

  In the real work questions of sounding of an ionosphere are considered by difficult signals. Efficiency of use of signals with big base on an alignment with signals with base about 1 is estimated. It is shown that when using difficult signals it is possible to lower significantly capacity at preservation ...

• 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 ...

• The solution of a problem of detection of a signal at vertical sounding of an ionosphere

  In the real work the solution of a problem of determination of parameters of the radio impulse reflected from an ionosphere is considered. The noise component, and also the multibeam structure of a signal arising at formation two magnetoionic component is thus considered. Expression for definition of probability of reception of a radio impulse in these conditions ...

• 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....

• 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 ...

• 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 ...

• 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. ...

• 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 ...

• 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 ...

• 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 ...

• 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....

• 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 ...

• Numerical model of development processes of small-scaled irregularities of the equatorial ionosphere

  A numerical model of equatorial F-layer of ionosphere on simulating of ionosphere irregularities with object scale from 1 km during to the instability development is constructed. 1. Ossakow S. L. Spread F theories: a review. J. Atmos. Solar-Terr. Phys. 1981. Vol. 43. P. 437. 2. Кащенко ...

• 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 ...

• 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 ...

• 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 ...

• An influence of initial irregularities geometry on developments of the Rayleigh-Taylor instability in the equatorial F-layer of the ionosphere

  Results of numerical simulation of the Rayleigh — Taylor instability for different geometrical characteristics of the initial irregularities for evening equatorial conditions based on electrodynamically coherent mathematical model of the equatorial ionosphere F-layer are given. It is shown that increase only in the vertical extent of initial irregularity significantly accelerates development a rayleigh-Taylor bubble whereas increase only in lateral dimensions of initial irregularity insignificantly ...

• Research of process in bistable system when passing the mix of the harmonious signal and «white» noise

  ... процессы. 3. Лайонс Р. Ци фровая обработка сигналов. М., 2006. 4. Ponimatkin V. E., Shpilevoi A. A., Shabalin A. A. About Electromagnetic Compability of Radio Communication Stations Antennae // AIS-2010 «Atmosphere, ionosphere, safety». Kaliningrad, 2010. P. 184—186. 5. Rice S. O. Selected Papers on Noise and Stochastic Processes / ed. N. Wax.N. Y., 1974. P. 133.  6. Баскаков C. И. Радиотехнические цепи и сигналы....

• An analysis of possible damage of electrical devices by thunderstorm activity on the model of cloud-to-ground discharge

  ... Балтийского федерального университета им. И. Канта. 2015. Вып. 4. С. 61—67. 5. Ponimatkin V. E., Shpilevoi A. A., Shabalin A. A. About Electromagnetic Compability of Radio Communication Stations Antennae // Atmosphere, ionosphere, safety–2010. Kaliningrad, 2010. P. 184–186. 6. Пониматкин В. Е., Шпилевой А. А., Барсуков Д. Б., Утц В. А. Устройство защиты радиоприема от мощных электромагнитных ...

• An mathematical simulation of ionosphere with due regard for its three-dimensional irregularity

  Difference methods an approximate solution of a three-dimensional equation of ions diffusion with mixed derivatives and divergence first derivatives are considered. The task is reduced to a chain of three two-dimensional parabolic equations on base of the summary approximation method. Difference operators are constructed, and an analysis of its properties, test calculations and an estimate of a mixed derivatives role are carried out. 1. Самарский А. А. Теория разностных схем. М., 1977. 2. Фаткуллин...

• Dipolarization of the earth magnetic field and charge particles precipitation from the magnetic flux tube

  ... This process takes a few minutes and covers the region in the magnetosphere of 10 Earth radii. One of possible explanations of this phenomenon is associated with cooling magnetic flux tubes caused by the precipitation of the energetic particles in the ionosphere. We have made evaluation of the effectiveness of this mechanism. 1. Runov A., Angelopoulos V., Sitnov M. I. et al. THEMIS observations of an earthward-propagating dipolarization front // Geophysical Research Letters. 2009. Vol. 36. 2. Birn ...

• Modeling the formation of ion shadows behind a positively charged microsatellite in an oxygen plasma by the molecular dynamics method

  Results of modeling the formation of ion shadows in a thermal ionospheric plasma consisting of oxygen ions and electrons behind a charged microsatellite are presented. The molecular dynamics method was used for modeling. It is shown that in a time of the order of 610-5 s an ionic shadow with a low ion concentration ...

• 3D-simulation of equatorial F-spread: a comparing MI3 with SAMI3

  ... Калининградского государственного университета. 2003. Вып. 3. С. 59—68. 12. Huba J. D., Joyce G., Krall J. Three-dimensional modeling of equatorial spread F // Aeronomy of the Earth's atmosphere and ionosphere. IAGA Special Sopron Book Series. 2011. Vol. 2. P. 211—218. Matsievsky S., Kashchenko N., Ishanov S., Zinin L. three-dimensional simulation, equatorial spread F. 102-105

• A modeling the interaction of a oxygen plasma with a positively charged microsatellite with the molecular dynamics modeling method

  The results of modeling the interaction of a single-ion thermal ionospheric plasma consisting of oxygen ions and electrons with a charged microsatellite are presented. The molecular dynamics modeling method was used. It is shown that behind the satellite there is a so-called ionic shadow with a low ionic concentration....

• Simulation of ion distribution near charged satellite by molecular dynamics simulation method. 2D approximation

  ... для расчета газодинамических задач, моделирующих вязкие течения. Препринт ИПМ им. Келдыша. 1985. № 85. 9. Ma T.-Z., Schunk R. W. A fluid model of high voltage spheres in the ionosphere // Planet. Space Sci. 1989. Vol. 37. P. 21—47. 10. Рылина И. В., Зинин Л. В., Григорьев С. А. и др. Гидродинамический подход к моделированию распределения тепловой ...