. Author manuscript; available in PMC: 2021 Oct 1.

Published in final edited form as: Atmos Environ X. 2020 Oct 1;7:10.1016/j.aeaoa.2020.100080. doi: 10.1016/j.aeaoa.2020.100080

Table 3.

Estimate of uncertainty in 1 s (2 s for O₃) measurements due to random (σ_precision) and systematic (σ_bias) uncertainties during the 14 stationary collocation periods.

Parameter	σ_precision	Bias₁	Bias₂	Bias₃	σ_bias	σ_total

O₃ (ppbv)	2.3	1.8	−2.5	1.5	2.8	3.6
NO₂ (ppbv)	2.3	−0.5	−0.9	1.4	1.5	2.7
NO (ppbv)	5.9	0.2	−0.5	0.0	2.0	6.2
BC (μg∙m⁻³)	0.52	−0.11	0.11		0.21	0.56
¹BC* (μg∙m⁻³)	0.42	0.05	−0.05		0.08	0.43
PN_0.3–0.5 (L ⁻¹)	1300	925	−752	−87	991	1635
PN_0.5–1.0 (L⁻¹)	251	14	3	−24	31	253
PN_1.0–2.0 (L⁻¹)	93	9	1	−6	11	94
PN_2.0–5.0 (L⁻¹)	64	13	−7	−7	12	65

BC* is black carbon after correction for the systematic bias in Car 2 (Section 4.4).