Stability analysis of geomagnetic baseline data obtained at Cheongyang observatory in Korea
| Autor: | S. M. Amran, W.-S. Kim, H. R. Cho, P. G. Park |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Geoscientific Instrumentation, Methods and Data Systems, Vol 6, Pp 231-238 (2017) |
| Druh dokumentu: | article |
| ISSN: | 2193-0856 2193-0864 94412324 |
| DOI: | 10.5194/gi-6-231-2017 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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