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Abstract—It is necessary to estimate the rotational motion parameters of the spacecraft around the center of mass because we should know the conditions of carrying out technological processes. One way to estimate it is to measure the Earth’s magnetic field by means of onboard equipment. Measurements were made with the use of MAGKOM scientific equipment onboard AIST small spacecraft series. Measurement data processing of two sensors was performed. First, we can see that statistic investigation confirms the correct operation of measuring equipment. Second, a significant shift in average was established between corresponding channels of various sensors. Third, other devices and scientific equipments operation can significantly affect the measurement data. These results can be used in the design of advanced space technique and the creation of new information measurement system with high accuracy.