Event Title

The Magnetospheric Influence on the Diurnal Variation of the Ionospheric F-Region During Geomagnetically Quiet Conditions

Location

Yosemite National Park

Start Date

2-7-1974 9:30 AM

End Date

2-7-1974 9:45 AM

Description

A diurnal model of the mid-latitude ionospheric F-region is used to study the magnetospheric-ionospheric coupling during geomagnetically quiet conditions. From the solar EUV flux, the model calculates at each altitude and time step primary photoelectron spectra and ionization rate of various ion species. The photoelectron transport equation is solved for the secondary ionization rates, photoelectron spectra and various airglow excitation rates. Five ion continuity equations are solved to determine the ion composition, electron, ion and neutral gas heating rates. The electron and ion temperatures are calculated and the electron density is determined from the continuity equation that includes the effects of transport by diffusion, magnetospheric-ionospheric energy and plasma transport and neutral winds. The calculations are performed for a diurnal cycle considering a stationary field tube co-rotating with the earth. The boundary conditions used in the model are determined from the incoherent backscatter radar measurements of T, T. and 0 flux at 800 km over Millstone Hill (Evans, 1971). The diurnal calculations for March 23-24, 1970, are compared with the measured ionospheric properties and form the basis for determining the importance of magnetospheric-ionospheric coupling.

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Feb 7th, 9:30 AM Feb 7th, 9:45 AM

The Magnetospheric Influence on the Diurnal Variation of the Ionospheric F-Region During Geomagnetically Quiet Conditions

Yosemite National Park

A diurnal model of the mid-latitude ionospheric F-region is used to study the magnetospheric-ionospheric coupling during geomagnetically quiet conditions. From the solar EUV flux, the model calculates at each altitude and time step primary photoelectron spectra and ionization rate of various ion species. The photoelectron transport equation is solved for the secondary ionization rates, photoelectron spectra and various airglow excitation rates. Five ion continuity equations are solved to determine the ion composition, electron, ion and neutral gas heating rates. The electron and ion temperatures are calculated and the electron density is determined from the continuity equation that includes the effects of transport by diffusion, magnetospheric-ionospheric energy and plasma transport and neutral winds. The calculations are performed for a diurnal cycle considering a stationary field tube co-rotating with the earth. The boundary conditions used in the model are determined from the incoherent backscatter radar measurements of T, T. and 0 flux at 800 km over Millstone Hill (Evans, 1971). The diurnal calculations for March 23-24, 1970, are compared with the measured ionospheric properties and form the basis for determining the importance of magnetospheric-ionospheric coupling.