Accession Number : AD0432872

Title :   A METHOD FOR OBTAINING INSTANTANEOUS VALUES OF RECOMBINATION COEFFICIENT,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK IONOSPHERE RESEARCH LAB

Personal Author(s) : Mitra,A. P.

Report Date : 01 FEB 1964

Pagination or Media Count : 34

Abstract : Currently available methods for the experimental determination of the effective recombination coefficient from the diurnal variations of ionospheric ionization, height or absorption, give reliable values only where the coefficient has no diurnal variation. Where such a variation exists, the coefficients determined by these methods are spuriously altered, sometimes to zero or even negative values, and the diurnal variation is substantially exaggerated. A method is introduced for obtaining the instantaneous values (as against 'comparison' values given by current methods) at layer maxima, applicable principally for the E and the F1 regions. It is shown that an application of this method to the E region critical frequency data of a number of medium and low latitudes stations gives remarkable small diurnal variations of the coefficient at E region heights in contrast with the large diurnal variation obtained by the 'comparison' methods. Another surprising feature of the results is that the diurnal variations for both high and low latitudes are in the same sense, and there is no definite evidence of a phase reversal - again contradicting results obtained by comparison methods. (Author)

Descriptors :   (*RECOMBINATION REACTIONS, IONIZATION), (*DIURNAL VARIATIONS, IONOSPHERE), ELECTRON DENSITY, TIME, EQUATIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE