| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Trace gases (excluding ozone) >
SO2 Total Column
  | Measurement Definition*: 2D field of total amount of SO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
EMI-2
Environment Monitoring Instrument-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 | |
IASI
Infrared Atmospheric Sounding Interferometer | Operational
| Measures tropospheric moisture and temperature, column integrated contents of ozone, carbon monoxide, methane, nitrous oxide and other minor gases which affect tropospheric chemistry. Also measures sea surface and land temperature. | n/a | |
NACHOS Hyperspectral Imager
NACHOS Hyperspectral Imager | Operational
| | n/a | |
IASI-NG
Infrared Atmospheric Sounding Interferometer - New Generation | Being developed
+/-50 % | Measures profiles of atmospheric temperature, humidity, ozone, carbon monoxide, columns of methane, nitrous oxide, and other minor gases, and sea, ice, and land surface temperature and emissivity. Provides information on aeorols and cloud: fractional coverage, phase, cloud top height (input to Polar AMVs) and particle size. Prime applications: NWP, AC/AQ, climate. Secondary applications: NWC, land/ocean surface monitoring. IASI-NG will resume IASI role as internationl standard for satellite inter-calibration (GSICS). | n/a | |
UVN (Sentinel-4)
UV-visible- near infrared imaging spectrometer (Sentinel-4) | Being developed
| Supporting atmospheric composition and air quality monitoring services. | 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, CO, CHOCHO as well as Aerosols and UV Index. | n/a | |
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* Description adapted from WMO.
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