Estimation of ion velocity and temperature from asymmetric model incoherent scatter spectra

Details Estimation of ion velocity and temperature from asymmetric model incoherent scatter spectra Estimation of ion velocity and temperature from asymmetric model incoherent scatter spectra

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jatp...52..483c&link_type=abstract

(EISCAT Scientific Association, International EISCAT Workshop, 4th, Sigtuna, Sweden, June 5-9, 1989) Journal of Atmospheric and

Physics

1

Earth Ionosphere, Gyrofrequency, Incoherent Scatter Radar, Ion Temperature, Atmospheric Models, Doppler Effect, Electric Field Strength, Ion Scattering, Ionospheric Currents, Velocity Distribution

Scientific paper

A simple relaxation collision model is used to obtain line-of-sight ion velocity distributions and incoherent scatter spectra for ion-neutral collision frequency of comparable order to the ion gyro-frequency and crossed electric and magnetic fields. The deduced Doppler shift and Maxwellian temperature estimates are compared with the line-of-sight ion mean velocities and plasma temperatures in the model. The spectrum parameter estimates arise from the fitting of a Maxwellian spectrum to the relaxation model spectrum using standard procedures. The deviation of these estimates from the given parameters of the ion velocity distribution for different electric field strengths and directions of observation are discussed. Spectrum estimates depart most from plasma parameters for viewing directions across the electric field.

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