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Evaluation of Radiation Belt Space Weather Forecasts for Internal Charging AnalysesA variety of static electron radiation belt models, space weather prediction tools, and energetic electron datasets are used by spacecraft designers and operations support personnel as internal charging code inputs to evaluate electrostatic discharge risks in space systems due to exposure to relativistic electron environments. Evaluating the environment inputs is often accomplished by comparing whether the data set or forecast tool reliability predicts measured electron flux (or fluence over a given period) for some chosen period. While this technique is useful as a model metric, it does not provide the information necessary to evaluate whether short term deviances of the predicted flux is important in the charging evaluations. In this paper, we use a 1-D internal charging model to compute electric fields generated in insulating materials as a function of time when exposed to relativistic electrons in the Earth's magnetosphere. The resulting fields are assumed to represent the "true" electric fields and are compared with electric field values computed from relativistic electron environments derived from a variety of space environment and forecast tools. Deviances in predicted fields compared to the "true" fields which depend on insulator charging time constants will be evaluated as a potential metric for determining the importance of predicted and measured relativistic electron flux deviations over a range of time scales.
Document ID
20080013292
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Minow, Joseph I.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Coffey, Victoria N.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Jun, Insoo
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Garrett, Henry B.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
December 10, 2007
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: AGU Fall Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 10, 2007
End Date: December 14, 2007
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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