| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Trace gases (excluding ozone) >
SO2 Mole Fraction
  | 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 |
EPIC
Earth Polychromatic Imaging Camera | Operational
| Diurnal measurements of ozone, sulfur dioxide, UV surface radiation, clouds, aerosols and vegetation. | n/a | |
GEMS
Geostationary Environment Monitoring Spectrometer | 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)
Microwave Limb Sounder (EOS-Aura) | Operational
| Measures lower stratospheric temperature and concentration of H2O, O3, ClO, HCl, OH, HNO3, N2O and SO2. | n/a | |
NACHOS Hyperspectral Imager
NACHOS Hyperspectral Imager | Operational
| | n/a | |
UVNS (Sentinel-5 precursor)
TROPOMI | Operational
| Supporting atmospheric composition and air quality monitoring services. | n/a | |
GEOXO Atmospheric Composition
GEO Extended Operations Atmospheric Composition | Being developed
| | n/a | |
UVNS (Sentinel-5)
Ultra-violet Visible Near-infrared Shortwave-infrared spectrometer | Being developed
| Supporting atmospheric composition and air quality monitoring services. Measurements of atmospheric trace gases, primarily O3, NO2, SO2, HCHO, CH4 and CO. | n/a | |
UVN (Sentinel-4)
UV-visible- near infrared imaging spectrometer (Sentinel-4) | Proposed
| Supporting atmospheric composition and air quality monitoring services. | n/a | |
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* Description adapted from WMO.
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