Dynamics of the convection in the inner magnetosphere by observations of the diffuse aurora, SAR arc and ionospheric drift
Abstract
Until recently in the literature the attention has been focused to a phenomenon which is called as a polarization jet Galperin et al 1974 or SAID subauroral ion drifts Spiro et al 1979 These are polar orbiting satellite observations of a narrow band of westward plasma drift at a height of F2 layer with a velocity up to 2 km s in the vicinity of plasmapause projection during substorms As a result of the last classification of data from the Millstone Hill incoherent scatter radar Foster and Vo 2002 it has been found that during geomagnetic disturbances at Kp ge 4 the westward plasma drift region equatorward of auroral precipitations in the MLT night sector has a latitudinal extent which is much more than in SAID Therein this phenomenon is called as a subauroral polarization stream SAPS The basic regularities of convection electric field penetration to plasmasphere latitudes at Kp 1-6 have been shown earlier as well as by data from the Millstone Hill incoherent scatter radar by Wand and Evans 1981 Lyatskaya and Kuznetsov 1990 found the relation of the height dynamics of the regular ionization layer F2 azimuth component of the electric field at middle latitudes to the increase of the IMF southern component The authors Ievenko et al 2001 obtained the recurring features of penetration of the convection electric field to plasmasphere latitudes in the dynamics of F2 layer ionization in the region of diffuse aurora DA and SAR arc during substorms Here we present the comparison results of subauroral luminosity dynamics in
- Publication:
-
36th COSPAR Scientific Assembly
- Pub Date:
- 2006
- Bibcode:
- 2006cosp...36.1210I