In the work, based on the data analysis of the interplanetary magnetic field and fluxes of solar wind charged particles for 2014 year, a set of parameters is proposed, which can be indicators of the degree of complexity of the recorded events. The basic characteristic of the considered physical systems is the dimension of the phase space. Our approach allows us to study processes in a multidimensional phase space without reducing its dimension. In the first approximation, the dimension can be interpreted as the minimum number of independent variables required to describe a physical process. In this setting, each of the phase space unit vectors has its own memory depth scale and its own stability parameter, the Lyapunov parameter. It is established that the dominant dimension of the phase space is the same for both the magnetic field and the solar wind flux and is equal to 5. The analysis of the Lyapunov exponents shows that all the observed series of processes belong to dissipative-type hyperchaos.
In this work, based on the database of magnetic field indices Kp, AE, and Dst, we consider the relationship between geomagnetic activity and ionospheric scintillation indices S4 and RODI based on in-situ satellite measurements. 68 events with calm and disturbed geomagnetic conditions for 2014-2015 were selected and analyzed. The correlation coefficients of the scintillation indices with high-latitude AE and low-latitude Dst are obtained. So for 2014, in the case of a disturbed situation (25 cases), there is a positive correlation between the indices.
Based on the database of Kp and AE magnetic field indices, we consider the effect of solar activity on fluctuations in the electron concentration in the Earth’s ionosphere using satellite in-situ measurements in 2014. The geophysical indices S4 and RODI are calculated, and their correlation coefficients are obtained in cases with calm and disturbed geomagnetic environments. The weekly (from January 6 to 12, 2014) polar maps of the indicated indices were calculated and constructed.
The paper discusses the transfer to the ionosphere of disturbances, that are produced by powerfull events in the atmosphere - tropical typhoons or cyclones. As experimental results, the electron density measurements carried out on ESA SWARM satellites were used. All the largest events in 2014 (typhones of categories 4 and 5 on the Saffir-Simpson scale) were processed. The used methods distinguish two type of the response. We can detect both wave-like responses from the cyclone in the ionosphere and disturbances that can be associated with the electric field mechanisms. The second type responses manifest themselves in the form of electrostatic noise or magnetic field variations, that are often recorded by the onboard equipment of modern satellites.
The work is devoted to the study of wave disturbances which appears on ionospheric heights over the city in the example of Moscow during 2010 summer’s anomalous heat. Unique GPS data bases form MNGS (Moscow Navigational and Geodetic Support) and IGS data were used in work. We processed over 21 thousand hours of individual GPS observations. As a result of the processing of the wave structures spectra, periods were marked where significant changes (more than a sample variance) in the parameter of the decrease in the wave spectrum were observed. It was found that in more than 90% of cases these periods coincide with the appearance of inversion in the atmosphere at morning hours during the development of UHI.
We studied the dynamics of the GLONASS and GPS radio physical signal slips, as well as the slips in determining the total electron content (TEC) at the stations in the mid- and high-latitude regions under different geophysical conditions over 2014 Nov - 2015 Jul. At high latitudes, the pseudo-range P1 measurement slip density is shown to be lower for the GLONASS system, than that for GPS. At mid-latitudes, the TEC slip mean density (N1 TECU/min) under quiet geomagnetic conditions practically does not depend on the Kp and AE index behavior, and does not exceed 12%. At high-latitudes, N1TECU/min in winter is generally higher, than that in the summer, and may reach 50-60%. The N1 TECU/minvariation at highlatitudes correlates with the geomagnetic index behaviors; however, it depends on Kp and AE essentially differently. Under disturbed conditions, N1 TECU/min increases as AE grows more slowly, that it does under quiet conditions. On the contrary, N1 TECU/min growth as Kp increases under disturbed conditions occurs on a factor of 1,5 faster, than it does under quiet geomagnetic conditions. The N1TECU/min value dependences on the ionospheric disturbance index (Wtec) at mid- and high-latitudes are similar. An increase in the TEC slip density, N1TECU/min in wintertime occurs on a factor of 1,5 faster, than it does in summer. Simultaneously, at high-latitudes, the N1TECU/min growth with the Wtec increase occurs on a factor of 2-2,5 faster, than it does at the mid-latitudes.
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