Electron density and recombination coefficient profiles obtained in relation to ionospheric absorption and rocket measurements

Details Electron density and recombination coefficient profiles obtained in relation to ionospheric absorption and rocket measurements Electron density and recombination coefficient profiles obtained in relation to ionospheric absorption and rocket measurements

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ang....34...25c&link_type=abstract

Annales de Geophysique, vol. 34, Jan.-Mar. 1978, p. 25-30.

Computer Science

Sound

Electron Density Profiles, Ionospheric Propagation, Recombination Coefficient, Rocket Sounding, D Region, E Region, Electron Scattering, Ground Stations, Pair Production, Solar Radiation

Scientific paper

This paper presents theoretical computations of electron-ion pair production rate in the D and E regions of the ionosphere at a low latitude station due to solar radiations in the wavelength range 1-1225 A. Also reported are computations of ionospheric absorption using generalized magnetoionic theory appropriate to the electron density profile composed from the results of rocket (60-70 km), partial reflections (70-93 km), ionosonde (100-105 km) for conditions solar zenith angle 10 deg in equinoctial month of low solar activity. Several assumed N-h profiles in the height range 93-100 km were tried out until the computed total absorption and virtual height agreed reasonably with the observed absorption on 1.8, 2.2 and 2.5 MHz and the virtual heights of reflection at these frequencies. The final profile shows an inflection at about 95 km corresponding to electron density of 30,000 electrons per cu cm. The effective recombination coefficient is worked out and its height distribution is compared with that of the dissociative recombination coefficient. This is shown for four different models of nitric oxide in the computation of ion production rate. It is found that the effective recombination coefficient is greater than the dissociative recombination coefficient below 80 km and lower at heights above 90 km to the extent of an order of magnitude.

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