Optimum Unit Positioning in Spacecraft for Space Missions With Challenging DC Magnetic Cleanliness Requirements

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.