Accession Number : AD0707822

Title :   THE MAGNETIC CONTROL OF GLOBAL PATTERNS OF F-LAYER VERTICAL DRIFT CAUSED BY NEUTRAL WINDS.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Pike,C. P.

Report Date : MAY 1970

Pagination or Media Count : 14

Abstract : Basic considerations to a study of F-layer modification by vertical drift from any postulated neutral atmospheric wind system are the effects of local magnetic inclination and declination upon the resulting F-layer vertical drift velocity. The effect of local magnetic inclination enters in the term sin I cos I contained in the expression for the vertical drift velocity Vz = V sin I cos I, where V is the wind velocity in the horizontal plane. A global map with contours of sin I cos I is presented in the report which enables one to compare the effect of inclination in different regions. This map shows where inclination would either tend to null or to maximize F-layer vertical drift respectively. The global maps clearly show that vertical drift is often strongly nonsymmetric at magnetic conjugate locations. Finally, an understanding of F-layer structure and dynamics is particularly important in many radio propagation problems. (Author)

Descriptors :   (*RADIO WAVES, IONOSPHERIC PROPAGATION), (*IONOSPHERE, ATMOSPHERIC MOTION), ELECTRON DENSITY, IONIZATION, GEOMAGNETISM

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE