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BMP390 · First 23 Hours

ARAS Observatory · Independent 10 Hz atmospheric pressure observation · 5–6 November 2026 (UTC)

Summary. The station recorded 839,869 pressure samples over 23.33 hours. Pressure changed from 1021.8904 to 1018.9396 hPa (−2.9508 hPa). An exploratory retrospective scan flagged 37 short-period deviations for review; none has a confirmed atmospheric source.

Measured quantities

Observation interval (UTC)2026-11-05 22:33:51 – 2026-11-06 21:53:37
Samples / nominal acquisition839,869 / 10 Hz
First → last station pressure1021.8904 → 1018.9396 hPa
Minimum / maximum pressure1017.4426 / 1021.9100 hPa
Sequence gaps0 detected
One-second bins with absent measurements1
Exploratory 10-second residual MAD scale0.00715 hPa
Retrospective anomaly-screen threshold0.04288 hPa
Preliminary candidate intervals37, unverified

Station pressure — 23-hour trend

Station pressure — 23-hour trend
Measured pressure history (minute means).

BMP390 sensor temperature

BMP390 sensor temperature
Sensor temperature, not calibrated outdoor air temperature.

Short-period pressure residuals

Short-period pressure residuals
Exploratory 10-second averages relative to a centered 10-minute local baseline.

Pressure time–frequency spectrogram

Pressure time–frequency spectrogram
Measured data, displayed at 1 Hz; one missing second was display-filled in the earlier analysis.

Pressure power spectral density

Pressure power spectral density
Computed from the actual pressure observations.

Largest preliminary deviation — close view

Largest preliminary deviation — close view
Approx. +0.089 hPa unverified candidate. No event source identified.

Method and limitations

The archive is a retrospective review of measurements collected by ARAS with a Bosch BMP390 and Raspberry Pi Pico H. The exploratory anomaly count uses 10-second aggregation and a centered 10-minute baseline; because this baseline includes later data, the count must not be interpreted as detections from the separate live WARNING algorithm. The 1 Hz spectrogram from the original longer analysis used a display-only fill for one missing second; the unmodified original raw CSV did not contain synthetic samples. Weather, wind, sensor housing, temperature, and local disturbances remain possible explanations.

Scientific status: UNVERIFIED PRESSURE FLUCTUATIONS — NOT A CONFIRMED EXTERNAL EVENT.