Accession Number : ADA325072

Title :   First Principles and Applications-Oriented Ionospheric Modeling Studies, and Wave Signatures in Upper Atmosphere Density,

Corporate Author : BOSTON UNIV MA CENTER FOR SPACE PHYSICS

Personal Author(s) : Fox, Matthew W. ; Pi, Xiaoqing ; Forbes, Jeffrey M.

PDF Url : ADA325072

Report Date : JAN 1997

Pagination or Media Count : 40

Abstract : The Phillips Laboratory Global Theoretical Ionospheric Model (GTIM) has formed the basis for a series of investigative studies. First, a multiple ion version of the theoretical code has been developed that is based on the same numerical solution type, to help insure that 0+ densities are consistent with the existing one ion GTIM. Next, two new applications of the GTIM have been completed, in the study of wavelike disturbances in low latitude electric fields, demonstrating the resulting wavelike ionospheric effects, and in a study to determine the F region peak signatures that could be inferred from in Situ measurements made at DMSP altitudes. Finally, a system for ionospheric ray tracing is described that is based on a simple analytical profile model that can readily absorb real time information and whose ray tracing specification can be substantially improved with only minimal updates Work performed on neutral density studies has concentrated on the delineation and interpretation of longitudinal structures in SETA data. These include the 'longitude/UT' effect and longitudinal wave structures.

Descriptors :   *IONOSPHERIC MODELS, *IONOSPHERIC DISTURBANCES, EQUATORIAL REGIONS, PEAK VALUES, REAL TIME, NUMERICAL ANALYSIS, ELECTRIC FIELDS, PROFILES, RAY TRACING, F REGION, ATMOSPHERIC DENSITY, UPPER ATMOSPHERE.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE