Fig. 2: Calibration performance comparison of the NO2 sensors after b-SBS and SBS calibration. | npj Climate and Atmospheric Science

Fig. 2: Calibration performance comparison of the NO2 sensors after b-SBS and SBS calibration.

From: In-situ baseline calibration approach for enhanced data quality of large-scale air sensor monitoring networks

Fig. 2

a R2 performance and b RMSE performance across diverse calibration samples after b-SBS and SBS calibration, sorted by calibration R2 values. The left y-axis represents the absolute values of R2 and RMSE for both methods (blue line and green line), while the right y-axis shows the differences in R2 and RMSE (R2_diff and RMSE_diff, represented by gray bars). The boundary lines for R2_diff = −0.1 and RMSE_diff = 1 are indicated by gray dashed lines, serving as reference lines for assessing the magnitude of the differences between the corresponding metrics.

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