Accession Number : ADA180990

Title :   Electron Density Profiles from Automatically Scaled Digital Ionograms. The Artist's Valley Solution.

Descriptive Note : Technical rept.,

Corporate Author : LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH

Personal Author(s) : Gamache,Robert R. ; Kersey,William T. ; Reinisch,Bodo W.

Report Date : JUL 1985

Pagination or Media Count : 48

Abstract : Electron density 'true height' profiles are calculated from automatically scaled Digisonde ionograms. The profile algorithm uses the modified polynomial fitting method separately for the E and the F region profile calculations. A new approach to considering the transition region between the E and F layers allows to determine the F profile with good accuracy from the ordinary echo trace. The total electron content between the peak of the E layer and the bottom of the F layer is estimated to account for the observed retardation as function of frequency on the F trace. No effort is made to find the valley shape since this is not possible from the O trace alone. The new algorithm is tested on some model ionograms. Keywords: Electron density; True height; Digital ionograms; Digisonde.

Descriptors :   *IONOGRAMS, *ELECTRON DENSITY, ACCURACY, E REGION, F REGION, ALGORITHMS, TRANSITIONS, SHAPE, DIGITAL SYSTEMS, ECHOES, PROFILES, MODELS, FITTINGS, POLYNOMIALS, HEIGHT, FITTING FUNCTIONS(MATHEMATICS)

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE