Development of a magnetospheric specification model. Volume 1. Final report, 15 Nov 87-31 Mar 90

Technical Report · Sat Jun 30 00:00:00 EDT 1990

OSTI ID:5527721

Freeman, J W; Wolf, R A; Spiro, R W; Voigt, G H; Hausman, B A

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.

• Research Organization: Rice Univ., Houston, TX (United States). Dept. of Space Physics and Astronomy
• OSTI ID: 5527721
• Report Number(s): AD-A-244460/2/XAB; CNN: F19628-87-K-0001
• Resource Relation: Other Information: See also Volume 3, AD-A244 460
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH MAGNETOSPHERE
MATHEMATICAL MODELS
BOUNDARY CONDITIONS
COMPUTERIZED SIMULATION
ELECTRIC FIELDS
ELECTRON PRECIPITATION
EVALUATION
ION DENSITY
IONOSPHERE
M CODES
MAGNETIC FIELDS
MAGNETIC STORMS
PROTONS
RADIATION BELTS
RADIATION FLUX
BARYONS
CHARGED-PARTICLE PRECIPITATION
COMPUTER CODES
EARTH ATMOSPHERE
ELEMENTARY PARTICLES
FERMIONS
HADRONS
NUCLEONS
PLANETARY IONOSPHERES
SIMULATION
661320* - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)