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On the feasibility of routine baseline improvement in processing of geomagnetic observatory data

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Academic year: 2021

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Fig. 1 Calculated hourly baseline values (blue) with λ = 0.5, pseudo-observed values (red) and functionally defined hourly baselines (green) for the X (first plot), Y (second plot) and Z (third plot) components of the EMF
Figure 4a shows a result of the algorithm’s operation after the pseudo-observed value on 17.04 was removed
Fig. 4 Influence of the frequency of absolute observations on the Q φ series. Rare observations lead to increase in the Q φ values and lower confi- confi-dence in the data obtained (a), more frequent observations produce the opposite result (b)
Fig. 5 Comparison between the baseline values for the three EMF components, obtained by the classical and the proposed methods for the period from February 20 to October 1, 2015
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