Researchers of IKIR FEB RAS made a presentation at the 49th seminar «Physics of Auroral Phenomena»

All-Russian seminar with international participation is organized annually by the Polar Geophysical Institute of the Russian Academy of Sciences in Apatity, Murmansk region. The participants are Russian and foreign scientists involved in the investigations of natural magnetospheric and geomagnetic disturbances, auroral phenomena, wave processes in the near-earth space and solar wind, solar-terrestrial relations, etc.

A report «Application of the Method of Linear Extrapolation of Dynamic Spectra of Whistlers Recorded in Kamchatka for Determining Electron Concentration in the Plasmasphere» was presented by the Leading Researcher of IKIR FEB RAS, Dr. Sci. (Phys.-Math.) Parovik Roman Ivanovich, and the Scientific Secretary of IKIR FEB RAS, Marchenko Ludmila Sergeevna.

Software packages have been developed based on the analysis of whistlers recorded in Kamchatka (the "Karymshina" observation point) to determine nose frequency using the linear extrapolation method and to subsequently estimate electron concentration in the plasmasphere (Park's method, DE1 model).

In this process, a graph of electron concentration versus time, N1(t), is constructed over the entire time interval of the whistler's existence, and the data are then averaged. The obtained concentration estimates at an altitude of 1000 km correlate with the data obtained using the International Reference Ionosphere (IRI) model.

Slide 2 – form of the standard whistler signal recorded at Karymshina observation site of IKIR FEB RAS, Kamchatka.

Slide 3 – this whistler trace after processing by the methods of threshold filtering and clustering.

Slide 4 – application of the liner extrapolation method to the whistler trace and estimation of electron concentration of the plasmasphere at the height of 1000 km.

Slide 5 – estimation of electron concentration of the plasmasphwere by the International Reference Ionosphere (IRI) model for Karymshina observation site at the time of whistler recording.

The work was carried out within the State assignment of IKIR FEB RAS (topic reg. No. 124012300245-2). The experimental data used in this work were obtained from the Shared Use Center “North-East Heliogeo-physical Center” (SWHC CUC) CKP 558279.