# 54 308-311 View full article

УДК 528.2

DOI: https://doi.org/10.36887/2415-8453-2024-3-54

Lukianchenko Iurii,
PhD in Technical Science, Senior Lecturer of Economic Expertise and Land Management Department,
West Ukrainian National University,
https://orcid.org/0009-0005-9203-4316
Lopushanskyi Oleksandr,
PhD in Technical Science Associate Professor of Economic Expertise and Land Management Department,
West Ukrainian National University,
https://orcid.org/0009-0000-9363-2979
Gumennyi Mykhailo,
PhD in Economic Science, Senior Lecturer of Economic Expertise and Land Management Department,
West Ukrainian National University
https://orcid.org/0000-0002-6704-9656
Perovych Ihor Lvovych,
Doctor of Technical Sciences, Professor of Economic Expertise and Land Management Department,
West Ukrainian National University
https://orcid.org/0000-0002-3265-7088
Lopushanska Mariia,
PhD student at Ivan Franko National University of Lviv, Head of the EIA and SEA Committee of the Professional Association of Environmentalists of the World (PAEW)
https://orcid.org/0000-0002-0557-1609

The article focuses on exploring the theoretical aspects of the phenomenon that characterizes the modern movements of the Earth’s poles. As scientific progress advances at an ever-increasing pace, technologies and interpretations of various phenomena evolve. This also applies to the phenomenon defining the movement of the Earth’s poles. In the past century, this phenomenon was primarily associated with the motion of the Earth’s rotation axis within its body. However, improvements in measurement accuracy and, consequently, advancements in precession and nutation models have led to the exclusion of short-period nutation components from the celestial pole motion model. Thus, the modern interpretation of the pole movement phenomenon has come to include these short-period nutation components as well. To establish a clear understanding of what exactly is meant by the phenomenon of pole movement, the article provides a detailed characterization of its modern definition. Existing datasets characterizing the current motion of the poles are analyzed, and parameters are identified that can be used for numerical analysis of data representing the time series of Earth’s pole motion. Typically, when studying pole motion, efforts are made to determine the recurrence period of certain cycles, such as the well-known Chandler period (1.2 years) and the annual period (1 year). However, this article focuses more on identifying additional numerical parameters characterizing the rotation of the axis. These parameters include indicators such as the average angular velocity of rotation, the average rotation period, and the direction of the averaged pole’s movement. The purpose of the article is to identify polar motion parameters that enable quantitative and qualitative analysis of this motion. The article considers the classical approach to interpreting Earth’s polar motion and highlights aspects of its modern interpretation. Additionally, available data sources containing information on polar motion over recent decades are described.

Keywords: Earth’s polar motion, precession, nutation, time series.

Rеferences

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The article was received 13.07.2024

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Lukianchenko Iurii, Lopushanskyi Oleksandr, Gumennyi Mykhailo, Perovych Ihor Lvovych, Lopushanska Mariia. 13.07.2024. Earth’s modern polar motion analysis theoretical aspects. The journal "Ukrainian Journal of Applied Economics and Technology". 2024 / #3. 308-311pp. https://doi.org/10.36887/2415-8453-2024-3-54

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Lukianchenko Iurii, Lopushanskyi Oleksandr, Gumennyi Mykhailo, Perovych Ihor Lvovych, Lopushanska Mariia. "Earth’s modern polar motion analysis theoretical aspects". The journal "Ukrainian Journal of Applied Economics and Technology". 13.07.2024. https://doi.org/10.36887/2415-8453-2024-3-54

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