空间辐射是与航天器安全运行紧密相关的空间环境，与之相关的仿真模拟实验平台对于相关领域学生学习与理解空间辐射环境十分重要。该文编制了一个空间轨道辐射仿真模拟实验平台——SORA(simulator for orbit and radiation)，介绍了SORA"输入—计算—输出"的总体结构设计及数据流，描述了SORA所应用的基于轨道根数的在轨位置计算、基于AE(辐射带电子)/AP(辐射带质子)的辐射带模型计算和在轨通量计算方法，展示了SORA GUI界面的构成要素及使用方法。该文使用SORA以一组标准GTO轨道参数作为实例输入，演示了SORA的执行与运算流程，并验证了SORA计算结果与同类型计算平台的一致性。SORA设计简洁的GUI界面及其精细化采样参数调整、离线数据实时计算等特点使其成为相关领域学生能够快速上手使用的模拟实验平台，其内在设计的科学性也保证其计算结果可供学生用于空间轨道辐射对于航天器影响的后续评估。
A simulation and experiment platform for in-orbit space radiation
[Objective]This paper introduces the simulator for orbit and radiation(SORA),a novel simulation and experiment platform for space orbit radiation.This platform is crucial in understanding the space radiation environment,an essential aspect of the safe operation of the spacecraft.The study potentially educates students and professionals in relevant fields on the importance of space orbit radiation and provides a comprehensible and efficient platform to conduct practical simulations and experiments.[Methods]Developing SORA involved integrating spaceborne observatory data,mission-specific parameters,and a dynamic user interface.A methodical process of"input-calculation-output"was adopted,involving multiple steps such as orbit position calculation using orbital parameters,radiation belt model calculation based on the AE/AP model,and in-orbit flux calculation inserted in the SORA system.The in-orbit position calculation is based on orbital elements whose specific position in the inertial coordinate system can be obtained by solving the Kepler equation.Converting the inertial coordinate system to a noninertial coordinate system can obtain the spatial position with the Earth-centered fixed coordinate system.The radiation belt particle flux calculation is based on the AE/AP model,which is constructed according to the geomagnetic field.By combining the orbit's spatial position with the geomagnetic reference field data,the corresponding magnetic coordinates can be calculated,and the particle flux at any position in space can be calculated using the interpolation method in the AE/AP model.Moreover,SORA calculates and averages the in-orbit flux through equal time interval sampling.Furthermore,researchers illustrate the graphical user interface(GUI)components and their usability in SORA.The user interface is intuitive with a walkthrough of the various functions and adjustable parameters.To test and validate the platform's effectiveness,researchers executed and computed the SORA process using a set of standard geostationary transfer orbit parameters as an example input.[Results]Execution of the example input confirmed the functional integrity and accuracy of SORA.We found that the computational results of SORA showed considerable consistency with similar platforms.This finding indicates the validity and reliability of SORA as an educational platform.Furthermore,the research showed that SORA's user-friendly GUI interface,alongside its fine-tuning capability of sampling parameters and offline computation feature,makes it an efficient and comprehensible tool for students and professionals in relevant fields.[Conclusions]This study encapsulates the importance of comprehensive radiation environment simulation tools such as SORA for space exploration and research.The development and implementation of the SORA platform is an important advancement in teaching and studying space orbit radiation.The precise structure and easy-to-use interface of the platform make it an ideal tool for students and professionals.The study encourages further work to improve and upgrade the SORA platform,ultimately contributing to a more profound understanding and management of space orbit radiation,key to the safe operation of spacecraft.Moreover,it should stimulate academic interest in space orbit radiation research,heralding additional developments in this field.
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