Today I copied the outside magnetometer data from the ADU and checked the data quality.
It looks almost fine but sometimes, not so frequently, the spectrum is strange like May 19.
I checked the time-series of the May 19 data, but there is no strange behavior, such as saturation, gap, etc.
In the spectrogram, the strange comb structure is always seen.
something trouble on the clock?
I'm developing a fitting code for the Schumann resonances considering other noises.
It looks working well.
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