### Methods of studying sighting axis oscillations when observing the Earth’s surface from the Russian segment of the International Space Station

**Published:**16.10.2020

**Authors:** Evdokimov R.A., Tugaenko V.Yu., Smirnov A.V.

**Published in issue: **#10(106)/2020

**DOI: **10.18698/2308-6033-2020-10-2024

**Category:** Aviation and Rocket-Space Engineering | **Chapter:** Aircraft Dynamics, Ballistics, Motion Control

The study introduces a method for determining the characteristics of long-period oscillations of the International Space Station structure by analyzing the displacement of the sighting axis of scientific equipment relative to the calculated position when observing the Earth’s surface from the Russian segment. The technique makes it possible to identify long-term oscillations through noise caused by high-frequency oscillations and measurement errors, as well as long-term trends associated with a change in the orientation of the station. The work was carried out as part of the first stage of the Pelican space experi-ment to develop the technology of wireless energy transmission in space. After processing the measurement results performed in the experiment sessions, it was possible to determine the maximum values of the amplitudes and angular velocities of the displacement of the sighting axis in order to clarify the requirements for the guidance system of scientific equipment used in the subsequent stages of the experiment.

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