An ELF Radiation Model for Estimating the Transient Electric Behavior of Space Units

In this work, the measurement procedure and modeling methodology of transient extremely low frequency (ELF) electric fields radiated by spacecraft equipment are presented. They are applied in order to provide a method for estimating the transient ELF electric behavior of the Command & Data Handling Management Unit (CDMU) and Power Conditioning and Distribution Unit (PCDU) of GOCE space mission. The modeling methods presented in this work rely on measurements conducted in the frame of ESA's study on Pre-Verification of THOR Electro-Magnetic Cleanliness Approach. For each of the units, based on the measurement datasets, the spectral and spatial parameters of the model are extracted and used to reproduce -or in the worst case provide a safe upper bound- the units' transient emissions.