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Analytical Representations for Characterizing the Global Aviation Radiation Environment Based on Model and Measurement Databases.
Space Weather ( IF 4.288 ) Pub Date : 2018-10-09 , DOI: 10.1029/2018sw001843
W Kent Tobiska 1, 2 , Leonid Didkovsky 1 , Kevin Judge 1 , Seth Weiman 1 , Dave Bouwer 1 , Justin Bailey 1 , Bill Atwell 1 , Molly Maskrey 1 , Chris Mertens 3 , Yihua Zheng 4 , Margaret Shea 5 , Don Smart 5 , Brad Gersey 1, 6 , Richard Wilkins 6 , Duane Bell 6 , Larry Gardner 7 , Robert Fuschino 8
Affiliation  

The Nowcast of Atmospheric Ionizing Radiation for Aviation Safety climatological model and the Automated Radiation Measurements for Aerospace Safety (ARMAS) statistical database are presented as polynomial fit equations. Using equations based on altitude, L shell, and geomagnetic conditions an effective dose rate for any location from a galactic cosmic ray (GCR) environment can be calculated. A subset of the ARMAS database is represented by a second polynomial fit equation for the GCR plus probable relativistic energetic particle (REP; Van Allen belt REP) effective dose rates within a narrow band of L shells with altitudinal and geomagnetic dependency. Solar energetic particle events are not considered in this study since our databases do not contain these events. This work supports a suggestion that there may be a REP contribution having an effect at aviation altitudes. The ARMAS database is rich in Western Hemisphere observations for L shells between 1.5 and 5; there have been many cases of enhanced radiation events possibly related to effects from radiation belt particles. Our work identifies that the combined effects of an enhanced radiation environment in this L shell range are typically 15% higher than the GCR background. We also identify applications for the equations representing the Nowcast of Atmospheric Ionizing Radiation for Aviation Safety and ARMAS databases. They include (i) effective dose rate climatology in comparison with measured weather variability and (ii) climatological and statistical weather nowcasting and forecasting. These databases may especially help predict the radiation environment for regional air traffic management, for airport overflight operations, and for air carrier route operations of individual aircraft.

中文翻译:

基于模型和测量数据库的全球航空辐射环境特征分析表示。

航空安全大气电离辐射临近预报气候模型和航空航天安全自动辐射测量(ARMAS) 统计数据库以多项式拟合方程的形式呈现。使用基于高度、L壳和地磁条件的方程,可以计算银河宇宙射线 (GCR) 环境中任何位置的有效剂量率。ARMAS 数据库的一个子集由 GCR 的第二多项式拟合方程表示,加上可能的相对论高能粒子(REP;范艾伦带 REP)在具有高度和地磁依赖性的L壳窄带内的有效剂量率。本研究不考虑太阳高能粒子事件,因为我们的数据库不包含这些事件。这项工作支持了 REP 贡献可能对航空高度产生影响的建议。ARMAS 数据库拥有丰富的西半球1.5 至 5 级L贝壳观测数据;许多辐射事件增强的案例可能与辐射带粒子的影响有关。我们的工作表明,该L壳范围内增强辐射环境的综合效应通常比 GCR 背景高 15%。我们还确定了代表航空安全大气电离辐射临近预报和 ARMAS 数据库的方程的应用。它们包括 (i) 与测量的天气变率相比的有效剂量率气候学,以及 (ii) 气候学和统计天气临近预报和预报。这些数据库尤其可以帮助预测区域空中交通管理、机场飞越操作以及单个飞机的航空公司航线操作的辐射环境。
更新日期:2018-10-09
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