Table 2.

Multi-linear regressions from the study period using collocated measurements at Del Paso Manor and T Street. Rows show the initial Pearson correlation coefficient (R²) between one AirBeam and the regulatory monitor, and the improvement with meteorological explanatory variables. REG indicates a regulatory monitor: 24-h filter-based Federal Reference Method sampler (FRM) for the third column and beta attenuation monitors (BAM) for the other four columns.

Variables of Regression	Hourly BAM vs. AirBeam: Adjusted R2	Daily Average BAM vs. AirBeam: Adjusted R2	Daily FRM vs. AirBeam: Adjusted R2	Hourly BAM vs. AirBeam: Adjusted R2	Daily Average BAM vs. AirBeam: Adjusted R2
Monitoring Site	Del Paso Manor	Del Paso Manor	Del Paso Manor	T Street	T Street
Initial R2	0.601	0.573	0.716	0.684	0.746
REG + Temp	0.604	0.596	0.738	0.686	0.747
REG + Dew	0.623	0.641	0.767	0.706	0.776
REG + RH	0.617	0.647	0.759	0.703	0.800
REG + WS	0.609	0.567	0.716	0.686	0.758
REG + Temp + Dew + RH + WS	0.648	0.651	0.762	0.715	0.804
REG + quadratic (Temp, Dew, RH, WS)	0.732	0.830	0.883	0.867	0.932