Biography
Biography: Valery Korepanov
Abstract
Small satellites are the main challenge nowadays to execute scientific and applied space experiments. Because of very dense package of electronic equipment in such satellites, the electromagnetic compatibility (EMC) problem became still more important than formerly. Especially it concerns cubesat-format scientific experiments aimed at electromagnetic processes study. Usually nanosatellites produce less electromagnetic interference (EMI) than big satellites; however, the compact design leads to a considerable increase of mutual influence between payload systems. So, special attention to EMC problem still at development stage is an essential task. The goal of the present report is to analyze the EMC problem for small satellites and to give advice how to determine existing radiation sources location inside the satellite body and their intensity. First, the EMC requirements specifications formulation for spacecraft mission and possible means to follow these requirements are discussed in the report. Next stage is to execute the measurements of electromagnetic interference sources intensity of separate units and their localization in the assembled satellite. The aim of employing EMI measures is to study whether a variety of different items of electronic equipment can operate in close proximity without causing any undue interference. These measurements are especially difficult in ELF-VLF frequency range because of specific peculiarities of field structure and high level of industrial noise. Several methods had been proposed for the localization of the stray magnetic field sources. Their analysis is made and it was concluded that the most convenient one is to use the magnetic field measurements by two sets of fixed and spaced 3-component magnetometers when the satellite is also fixed. Possible configuration of a customized EMI meter realizing this method for pre-flight analysis of nanosatellite interference is discussed. The results of its application for SEAM cubesat which is designed for electromagnetic research in the ionosphere are presented.