Using the 12-hour atmospheric pressure tide and a narrow FFT filter, the HAWC scaler pressure coefficient is measured as about -0.34 % per hPa for single-PMT rates, and outlier PMTs are flagged as malfunctioning.
Mohanty et al., Astropart
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Atmospheric pressure dependance of HAWC scaler system
Using the 12-hour atmospheric pressure tide and a narrow FFT filter, the HAWC scaler pressure coefficient is measured as about -0.34 % per hPa for single-PMT rates, and outlier PMTs are flagged as malfunctioning.