Article

Polar wind observations on Interball-2 satellite

January 2006

Authors:

Dmitry Chugunin

Space Research Institute, Russian Academy of Sciences

The results of measurements of the ionospheric ions fluxes in the nightside polar cap at an altitude of about 20000 km are presented The data have been obtained with the HYPERBOLOID instrument onboard the INTERBALLf 2 satellite Observations of ionospheric ion fluxes caused by heating in the auroral region have been excluded In addition an attempt has been made to exclude observations of the cleft ion fountain from the analysis The measurements in the summer and winter seasons when the ionosphere was totally sunlit and completely shadowed respectively are considered separately The data of the pure polar wind and other outflow types founded at chosen time are presented The flux values of the ionosphere ions are found to be strongly dependent on the intensity of the polar rain The measurements are compared to the existing models of the polar wind The best models for the description of our measurements are indicated Dependence of ionospheric outflow from polar rain intensities is discussed Thus new aspects of magnetosphere filling by ionospheric ions are presented This work was partially supported by grants INTAS 03-50-4872 and HIII-1739 2003 2

ResearchGate has not been able to resolve any citations for this publication.

ResearchGate has not been able to resolve any references for this publication.

Article

Comparison of measured polar wind outflow on 20000 km altitude with polar wind models

January 2008

Dmitry Chugunin

The results of measurements of the ionospheric ions fluxes in the nightside polar cap at an altitude of about 20000 km are presented. The data have been obtained with the HYPERBOLOID instrument onboard the INTERBALL 2 satellite. Observations of ionospheric ion fluxes caused by heating in the auroral region have been excluded. In addition, an attempt has been made to exclude observations of the ... [Show full abstract] "cleft ion fountain" from the analysis. The measurements in the summer and winter seasons (when the ionosphere was totally sunlit and completely shadowed, respectively) are considered separately. The data of the "pure" polar wind and other outflow types founded at chosen time are presented. The flux values of the ionosphere ions are found to be strongly dependent on the intensity of the polar rain. The measurements are compared to the existing models of the polar wind. The best models (for the description of our measurements) are indicated. Dependence of ionospheric outflow from polar rain intensities is discussed. Thus new aspects of magnetosphere filling by ionospheric ions are presented. This work was partially supported by grants RFFI 06-02-72560

Article

Polar Wind Observations on the Nightside of the Polar Cap at Altitudes of 2–3 RE: Results of the INT...

July 2002 · Cosmic Research

The results of measuring the fluxes of ionospheric ions in the nightside polar cap at an altitude of about 20 000 km are presented. The data are obtained with the HYPERBOLOID instrument onboard the INTERBALL-2 satellite. The passages without intense precipitation of magnetospheric ions and electrons have been selected using the ION instrument data, so that the observation of ionospheric ion ... [Show full abstract] fluxes caused by heating in the auroral regions can be excluded. In addition, an attempt has been made to exclude observations of the cleft ion fountain from the analysis. The measurements in the summer and winter seasons (when the ionosphere was totally sunlit and completely shadowed, respectively) are considered separately. By analyzing the distribution functions of the fluxes measured, we have isolated six different types of ionospheric plasma flows in the polar cap. A strong distinction has been revealed between summer and winter flows. In winter, only weak flows of H+ ions were detected. In the summer period, we detected both H+ and O+ ions. The flux values of the ionosphere ions are found to be strongly dependent on the intensity of the polar rain. The measurements are compared to the existing models of the polar wind. The best models (for the description of our measurements) are indicated. After the choice of measurement periods, the resulting region coincides with the ion depletion zone (IDZ). Based on the earlier measurements by the AKEBONO satellite, nothing could be said about the fluxes of thermal ions in this zone, because of the insufficient sensitivity of the instrument aboard this satellite.