Polar Geophysical Institute

Spatial pattern of events with simultaneous recording of riometric absorption and auroral VLF hiss

We have assessed the position and size of the region of increased absorption in the ionosphere for events of simultaneous recording of auroral hiss and bursts of cosmic radio noise absorption, using observational data from the Lovozero and Tumanny observatories. To estimate the s...

Average auroral electron flux energies and nitric oxide concentrations for auroras in the midnight sector of the auroral zone

The statistical distribution of the average energy of precipitating electron fluxes for the midnight sector of the auroral zone has been calculated using numerical modeling results. The average energy maximum is localized within 3–4.5 keV. We study the dependence of nitric oxide...

On the Ulam–Hyers–Rassias stability of noninstantaneous impulsive fractional integro–differential equations

In recent years, fractional–order derivatives and integrals have proven tobe powerful tools for modeling complex systems with memory effects, mak-ing them well–suited for describing various real–world phenomena. Fractional–order models are often more effective than their integer–...