16. The data quality objectives set out in the table and paragraphs below, for allowed uncertainty of assessment methods, and of minimum time coverage and of data capture of measurement, are provided to guide quality-assurance programmes—
| For ozone, NO and NO2 assessed at ozone sampling points | |
|---|---|
| Continuous fixed measurement | |
| Uncertainty of individual measurements | 15% |
| Minimum data capture | 90% during summer; 75% during winter |
| Indicative measurement | |
| Uncertainty of individual measurements | 30% |
| Minimum data capture | 90% |
| Minimum time coverage | >10% during summer |
| Modelling | |
| Uncertainty | |
| 1 hour averages (daytime) | 50% |
| 8 hours daily maximum | 50% |
| Objective estimation | |
| Uncertainty | 75% |