Stability analysis of geomagnetic baseline data obtained at Cheongyang observatory in Korea

Author:

Amran Shakirah M.ORCID,Kim Wan-Seop,Cho Heh ReeORCID,Park Po Gyu

Abstract

Abstract. The stability of baselines produced by Cheongyang (CYG) observatory from the period of 2014 to 2016 is analysed. Step heights of higher than 5 nT were found in H and Z components in 2014 and 2015 due to magnetic noise in the absolute-measurement hut. In addition, a periodic modulation behaviour observed in the H and Z baseline curves was related to annual temperature variation of about 20 °C in the fluxgate magnetometer hut. Improvement in data quality was evidenced by a small dispersion between successive measurements from June 2015 to the end of 2016. Moreover, the baseline was also improved by correcting the discontinuity in the H and Z baselines.

Publisher

Copernicus GmbH

Subject

Atmospheric Science,Geology,Oceanography

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