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January 8, 2018 at 5:50 pm #5465
uRADMonitor
Keymaster

The PM2.5 data is originally generated by the A3, which is then used to extrapolate the PM1.0 / PM10.0 via a linear model, which you probably saw already due to the common chart shapes. There’s a lot of literature covering this topic, and more transformation models. So we might see changes to these calculations in the future.