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Fig. 6 | Earth, Planets and Space

Fig. 6

From: Data agreement analysis and correction of comparative geomagnetic vector observations

Fig. 6

Long-term-correction effect. a Geomagnetic vector difference during the period of January–March 2020 at the Lijiang (LIJ) observatory before and after the long-term correction. b The geomagnetic vector difference no longer has a significant daily period after the daily correction. c The difference curve tends to level off after the long-term time drift and relative temperature coefficient correction; compared with (b), it no longer has significant temperature and time characteristics. In b, after the thick red line, dD is separated from the temperature profile but their trends remain consistent, which is thought to indicate a change in the relative temperature coefficient around the temperature inflection point

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