O+-Reduced Models of the High Latitude Ionosphere and the Ionospheric Alfvén Resonator in Broadband Pc1 Events

• Published in: Studia Geophysica et Geodaetica
• Main Authors: Prikner, K., Kerttula, R.
• Format: Article in Journal/Newspaper
• Language: unknown
• Subjects: ionospheric Alfvén resonator; subauroral Pc1 pulsations; numerical simulation; high-altitude ionosphere extrapolation; EISCAT
• Online Access: https://kramerius.lib.cas.cz/view/uuid:0e107b93-06d4-44b9-ad5a-6242733ac583; https://doi.org/10.1007/s11200-005-1629-1

The significance of the O+-ion density altitude profile of the outer ionosphere for determination of the Ionospheric Alfvén Resonator (IAR) lower harmonic structure has been demonstrated. The O+-reduced and exponentially extrapolated ionosphere models at high altitudes are generally acceptable for the IAR interpretation of subauroral broadband Pc1 events. Instantaneous ionospheric plasma data based on simultaneous EISCAT (CP-1, CP-7) measurements should be most suitable for the interpretation of different pulsation events. The limited applicability of the averaged International Reference Ionosphere (IRI) models has also been demonstrated.