Accession Number : AD0755447

Title :   Model Studies of the Lower Ionosphere,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK IONOSPHERE RESEARCH LAB

Personal Author(s) : Rowe,John N.

Report Date : 14 DEC 1972

Pagination or Media Count : 215

Abstract : A summary of quiet D-region electron density measurements made by the wave interaction technique at The Pennsylvania State University for the period October 1969 - January 1971 is presented. Some estimate of the uncertainty in these measurements is given also. The mean electron density profile for July 1970 noon and the measured relative positive ion composition are used as constraints to develop a model of D-region ion chemistry between 60 and 80 kilometers. The neutral densities were taken from previous experimental and theoretical studies. Electron production rates due to Lyman-alpha, ultraviolet, x-rays, and galactic cosmic rays were considered. Some estimates are reported of the rate of conversion of NO+ ions into water cluster ions, the NO density and the detachment rate. It is concluded that the model developed for summer noon conditions will predict reasonably well the average seasonal and diurnal behavior of the D-region electron density, in spite of uncertainties in the neutral chemistry. (Author)

Descriptors :   (*IONOSPHERE, ATMOSPHERE MODELS), ELECTRON DENSITY, IONS, PHOTOCHEMICAL REACTIONS, SOLAR RADIATION, COSMIC RAYS, ULTRAVIOLET RADIATION, DIURNAL VARIATIONS

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE