Accession Number:

ADA244420

Title:

Development of a Magnetospheric Specification Model. Volume 2: Appendices A, B, C, D, E

Descriptive Note:

Final rept. 15 Nov 87-31 Mar 90,

Corporate Author:

RICE UNIV HOUSTON TX DEPT OF SPACE PHYSICS AND ASTRONOMY

Report Date:

1991-06-30

Pagination or Media Count:

410.0

Abstract:

Rice University has developed a practical computer model that is capable of specifying electron and ion fluxes in the middle magnetosphere during geomagnetic storms. The model, called the Magnetospheric Specification Model MSM, used ground-based and satellite data from the Space Forecast Center- Environment Data Base to establish initial and boundary conditions and to determine input parameters for the magnetic and electric field models. These input values are updated every 15 minutes, and new output fluxes are computed for the same times. The primary function of the MSM is the specification of fluxes of 1-100 KeV electrons in the geostationary orbit region. However, it is also designed to specify a broad range of additional parameters for the global ionospherics-magnetospheric system, including fluxes of 1-50 KeV ions, auroral electron precipitation and ionospheric electric fields. The model is accompanied by an application program that allows specification of fluxes at an arbitrary point in the magnetosphere within the modeling region. Consistent with its primary function, the MSM has been tested against spacecraft data for 2 substantial storms and has been shown to produce a good characterization of the enhancements of 40 KeV electron fluxes in the equatorial plane. The model never failed to predict high fluxes when they were observed, although it did predict high fluxes in some cases when they were not observed and it did fail to predict flux dropouts observed by the spacecraft. The MSM is ready for adaptation for use in an operational setting where the goal is real-time and retrospective specification of hazardous charged particle fluxes associated with geomagnetic storms.

Subject Categories:

  • Atmospheric Physics
  • Geomagnetism
  • Computer Programming and Software
  • Particle Accelerators

Distribution Statement:

APPROVED FOR PUBLIC RELEASE