Accession Number : ADA130930

Title :   On the Morphology of Plasma Density Irregularities in the Auroral F-Region.

Descriptive Note : Technical rept.,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Vickrey,James F

PDF Url : ADA130930

Report Date : 01 Apr 1982

Pagination or Media Count : 36

Abstract : In this report a framework for understanding the morphology of high latitude plasma density irregularities is developed that has three component parts. namely, to predict irregularity morphology one must specify (1) the source of irregularities, (2) the lifetimes of irregularities once produced, and (3) the redistribution of irregularities by magnetospheric convection. An irregularity morphology model is developed using the simplest possible source function, classical diffusion, and a simple two-celled magnetospheric convection model. While the qualitative results of this model are encouraging, emphasis is placed on its limitations and how it can be improved in the future. The motivation for this study is two-fold; first, it is important ot predict the severity of propagation disturbances in the nuclear disturbed environment. In the absence of actual nuclear data, naturally occurring auroral disturbances provide a test bed for assessing the accuracy of predictive codes. Second, naturally occurring plasma density irregularities hinder DoD communications and surveillance systems. Therefore, understanding the processes that control the evolution and ultimate morphology of naturally structured plasma can help to predict system performance and perhaps develop mitigants.

Descriptors :   *Aurorae, *Plasmas(Physics), *F Region, High latitudes, Morphology, Magnetosphere, Convection, Diffusion

Subject Categories : Atmospheric Physics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE