| タイトル | Evaluation of Radiation Belt Space Weather Forecasts for Internal Charging Analyses |
| 著者（英） | Jun, Insoo; Garrett, Henry B.; Coffey, Victoria N.; Minow, Joseph I. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech.; NASA Marshall Space Flight Center |
| 発行日 | 2007-12-10 |
| 言語 | eng |
| 内容記述 | A 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. |
| NASA分類 | Meteorology and Climatology |
| 権利 | No Copyright |
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