The spacecraft-level magnetic budget in the framework of dc magnetic cleanliness programs of space missions is studied and analyzed. This analysis follows the unit-level magnetic characterization test campaigns that are performed in space missions with challenging magnetic cleanliness requirements. Taking into consideration the output of these test results, the total magnetic signature of the spacecraft may be estimated at the location of sensitive instruments or potential magnetically susceptible units that are included in the space mission. In this letter, a method that significantly reduces the total magnetic field generated by the spacecraft is investigated. The purpose of the algorithm is to minimize the system-level magnetic signature at specific points of interest and at areas around the spacecraft in order to conform to the cleanliness requirements. This analysis is based on repositioning the equipment inside the spacecraft structure in order to reduce the total generated magnetic field. Indicative simulations of the synthetic magnetic sources are carried out, validating the effectiveness of the method.

中文翻译：

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具有挑战性的直流磁清洁度要求的航天器中单元拓扑结构的确定

研究和分析了航天任务直流磁清洁度计划框架下的航天器级磁预算。该分析遵循在具有挑战性磁清洁度要求的空间任务中执行的单元级磁特性测试活动。考虑到这些测试结果的输出，航天器的总磁特征可以在空间任务中包含的敏感仪器或潜在磁敏感单元的位置进行估计。在这封信中，研究了一种显着降低航天器产生的总磁场的方法。该算法的目的是最小化特定兴趣点和航天器周围区域的系统级磁特征，以符合清洁度要求。该分析基于重新定位航天器结构内的设备以减少产生的总磁场。对合成磁源进行了指示性模拟，验证了该方法的有效性。