We ran a 21-day co-location test against a calibrated reference monitor.
The A2 tracked daily particulate changes reliably after calibration.
Twenty-one days indoors and outdoors, co-located with a recently calibrated reference instrument; readings sampled every five minutes and assessed for drift, dropout and humidity bias.
A capable trend monitor for informed households, but not a regulatory instrument.
No manufacturer reviewed or approved this assessment.
Sentinel-3C lifted off from Kourou on 15 September 2026, starting the planned transition that is intended to preserve Copernicus observations of oceans, land, ice and the atmosphere into the 2030s.
Released September 3, 2026, USGS Version 2.0 adds Alaska, Hawaii and most U.S. territories to the Cooperative National Geologic Map.
EUMETSAT schedules Copernicus Sentinel-3C for launch aboard a Vega-C rocket at 01:21 UTC on 15 September 2026.
