Table 5.
Statistics for TROPOMI and airborne comparisons with the coincidence criteria of CRF<50% and aircraft sampled within ±30 min of the S5P overpass with different a priori profiles and indication of whether the ΔCS threshold is applied.
| TROPOMI dataset | ΔCS <50hPa | RMA fit | r2 | Median percent difference | N |
|---|---|---|---|---|---|
| Standard slant column | No | y = 0.58×+1.5×1015 | 0.95 | −12% | 621 |
| Yes | y = 0.59×+1.5×1015 | 0.96 | −13% | 388 | |
| Standard TrVC | No | y = 0.71×+0.9×1015 | 0.90 | −11% | 621 |
| Yes | y = 0.68×+0.6×1015 | 0.96 | −19% | 388 | |
| NAMCMAQ TrVC | No | y = 0.84×+1.0×1015 | 0.83 | 4% | 621 |
| Yes | y = 0.77×+0.7×1015 | 0.95 | −7% | 388 | |