Magnetosphere-ionosphere interactions involve electric currents that circulate between the two regions; the associated Lorentz forces, existing in both regions as matched opposite pairs, are generally viewed as the primary mechanism by which linear momentum, derived ultimately from solar wind flow, is transferred from the magnetosphere to the ionosphere, where it is further transferred by colli...

Remote sensing of the ionosphere bottom using long wave radio signal propagation is a still going stro g and inexpensive method for continuous monitoring purposes. We present a propagation model describing the time development of solar flare effects. Based on monitored amplitude and phase data from VLF/LF transmitters gained at a mid-latitude site during the currently increasing solar cycle no....

A penetration of electric and magnetic fields of the first global electromagnetic ELF resonance into the ionosphere in the cavity Earth-ionosphere is investigated numerically. It is shown that a penetration height for magnetic components is 2–3 times greater than for electric components and it depends essentially on the value of the geomagnetic field and its orientation with respect to the norm...

In the presentation the most important proprieties of the radio wave propagation in the ionosphere are explained and its impact on the high performance radio transmissions is discussed. The principles of the orthogonal frequency division multiplexing is explained and new digital radio system based on this principle is presented. Then some experimental data registered in Cracow in Poland are sho...

The ionosphere is the propagation medium for radio waves transmitted by an over-the-horizon radar (OTHR). Ionospheric parameters, typically, virtual ionospheric heights (VIHs), are required to perform coordinate registration OTHR multitarget tracking and localization. inaccuracy of parameters has a significant deleterious effect on target localization OTHR. Therefore, improve accuracy OTHR, it ...

Many numerical models of magnetospheric dynamics treat the ionosphere as an inner boundary condition. These models have traditionally used the current continuity condition, treating the ionosphere as a sheet current in which the electric field is electrostatic. A more general boundary condition is suggested that not only is more complete, but also straightforward to implement. Results from a mo...

A problem of propagation of very long planetary waves in the upper atmosphere of the Earth is investigated. A new exact solution of the magnetohydrodynamics equations of the ionosphere in the spherical coordinate system is found taking into account the Earth’s rotation and geomagnetic field. The general dispersion equation for the planetary waves in the E and F regions of the ionosphere is deri...

The ionization produced by electrons having energies of several tens of electron volts in the nighttime Venusian atmosphere is investigated on the basis of plasma measurements made on board Venera 9 and 10. We conclude that electron fluxes are sufficient o produce a nighttime ionosphere with a maximal electron density of l0 • cm -3. Calculated density profiles of the Venusian nighttime ionosphe...