Non-stationary Alfvén resonator: Vertical profiles of wave characteristics

• Main Authors: K. Prikner, K. Mursula, F.Z. Feygin, J. Kangas, R. Kerttula, T. Pikkarainen, O.A. Pokhotelov, V. Vagner
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2000
• Subjects: EISCAT
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.20.7749; http://spaceweb.oulu.fi/~kalevi/publications/Prikneretal2000.pdf

A Pc1/IPDP event recorded by the Finnish search coil magnetometers on December 15, 1984, was analyzed in a companion paper [Mursula et al., this issue] using numerical simulations of the ionospheric Alfven resonator (IAR). EISCAT incoherent scatter radar data was used to determine the vertical proles of ionospheric plasma parameters. In this paper the detailed altitude profiles of several wave characteristics at the IAR eigenfrequency are computed up to 1000 km height, including e.g., the real normalized amplitude of the magnetic wave field component, ellipticity and orientation of the polarization ellipse in the horizontal plane. We also calculate the altitude profile of the energy ux density (Poynting vector). These features illustrate in detail the ionospheric effects on the wave spectral structure in a non-stationary IAR, and their signicance in the formation of the Pc1/IPDP signal on the ground.