Ukrainian Antarctic Journal

Vol 22 No 2(29) (2024): Ukrainian Antarctic Journal
Articles

The procedure for preparing one-second variometer data of the Argentine Island geomagnetic observatory

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  • Yurii Sumaruk,
  • Mykhaylo Orlyuk,
  • Andriy Marusenkov,
  • Yurii Otruba
Yurii Sumaruk
S.I. Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, Kyiv, 03680, Ukraine; State Institution National Antarctic Scientific Center, Ministry of Education and Science of Ukraine, Kyiv, 01601, Ukraine
Mykhaylo Orlyuk
S.I. Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, Kyiv, 03680, Ukraine
Andriy Marusenkov
Lviv Center of Institute for Space Research, Lviv, 79060, Ukraine
Yurii Otruba
State Institution National Antarctic Scientific Center, Ministry of Education and Science of Ukraine, Kyiv, 01601, Ukraine
DOI: https://doi.org/10.33275/1727-7485.2.2024.733
Published December 31, 2024
Keywords
  • absolute observations,
  • geomagnetic observatory,
  • fluxgate magnetometer,
  • proton magnetometer
How to Cite
Sumaruk, Y., Orlyuk, M., Marusenkov, A., & Otruba, Y. (2024). The procedure for preparing one-second variometer data of the Argentine Island geomagnetic observatory. Ukrainian Antarctic Journal, 22(2(29), 146-162. https://doi.org/10.33275/1727-7485.2.2024.733

Copyright (c) 2024 Ukrainian Antarctic Journal

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

Magnetic observatories have been and continue to be basic elements for studying historical and contemporary changes in the Earth’s geomagnetic field. In most cases, satellite data are used to characterize and study rapidly evolving processes in near-Earth space. However, in recent decades, data from ground-based observatories have been used to support satellite missions. These data must have high temporal resolution to analyze rapidly changing processes. Furthermore, processed data from observatories should be delivered with minimal delay. Advances in technology now allow geomagnetic observatories to be equipped with high-resolution instruments, enabling the rapid delivery of final data. This paper outlines the methods developed to obtain one-second ImagCDF data of the Quasi-definitive level using the geomagnetic records of the Argentine Island observatory (INTERMAGNET code AIA). The observatory's state-of-the-art equipment and absence of anthropogenic noise produce results that meet the INTERMAGNET requirements. The primary data were validated by analyzing the distribution of instrumental errors in the absolute
measurements. The quality of the difference in the field’s absolute value was assessed using statistical parameters, including the mean, standard deviation, and the absolute value of the maximum deviation. Peak and irregular noise values were identified by analyzing the results of numerical differentiation of the 10 Hz records from the LEMI-025N63 and the difference signals between this magnetometer and the proton magnetometer POS-1. Regular noises were identified from the signal spectra. Occasional spikes in the POS-1 readings were corrected by interpolating data between valid counts. One-minute temperature data of the sensor and electronic unit of the LEMI-025N63 variometer were aligned with the magnetic records (using identical digital filtering and resampling procedures). The data were processed using software recommended by INTERMAGNET.

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