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Histogram of cumulated measurement errors (N = 667,403) arising within five naturally ventilated screens during the De Bilt six-year field-calibration experiment. The red line is a Lorentzian fit (r2 = 0.98, Γ = 0.086 ± 0.001; x0 = 0.0018 ± 0.0005). The error range = −4.01 °C to 5.27 °C, with RMSE = ±0.12 °C.
