| OMI | Ozone Monitoring Instrument |
| ANDI | Atmospheric Nitrogen Dioxide Imager |
| AURN | Automatic Urban/Rural Network |
| DEFRA | Department for the Environment, Food and Rural Affairs |
| MOS | Metal Oxide Semiconductor |
| LTE | Long-Term Experiment |
| FE | Fractional Error |
| RSE | Residual Standard Error |
| PCC | Pearson Correlation Coefficient |
| tFC | Time From Calibration |
| InvNO2LinO3 | Inverse NO2, Linear O3 equation |