IRIS Knowledge Base :: Do the USArray TA data contain calibration signals? If so, when and where are they? What do they look like?

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Do the USArray TA data contain calibration signals? If so, when and where are they? What do they look like?

Calibrations on USArray TA data are run within a few days to weeks both after sensor installation and before sensor removal (if possible). The signal looks like large amplitude white noise with an abrupt start and end and lasts for about 2 hours. Two examples are illustrated in the attachments.

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