So2 Mole Fraction
Measurement Instruments
Measurement Definition: 3D field of amount of SO2 (Sulfur dioxide, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Measuring Units molecules.cm-2, Uncertainty Units %
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
| AHSI | Operational | Greenhouse Gases (CO2, CH4, N2O, etc), Atmospheric Pollutants (NO2, SO2, HCHO, etc) | n/a |  |
| EMI-2 | Operational | Ozone profile and total-column or gross profile of other species. Tracked species: BrO, ClO H2O, HCHO, NO, NO2, O3, SO2 and aerosol | n/a | |
| EPIC | Operational | Diurnal measurements of ozone, sulfur dioxide, UV surface radiation, clouds, aerosols and vegetation. | n/a | |
| GEMS | Operational | Measurements of atmospheric chemistry, precursors of aerosols and ozone in particular, in high temporal and spatial resolution over Asia. | n/a | |
| MLS (EOS-Aura) | Operational | Measures lower stratospheric temperature and concentration of H2O, O3, ClO, HCl, OH, HNO3, N2O and SO2. | n/a | |
| NACHOS Hyperspectral Imager | Operational | | n/a | |
| TROPOMI | Operational | Supporting atmospheric composition and air quality monitoring services. | n/a | |
| ACX | Being developed | | n/a | |
| UVN (Sentinel-4) | Being developed | Supporting atmospheric composition and air quality monitoring services. | n/a | |