Tropospheric column mapping (NO2/SO2)

• TROPOMI (TROPOspheric Monitoring Instrument) via Sentinel-5P (Precursor)

  TROPOMI products include tropospheric NO2 and SO2 column retrievals from nadir UV-VIS observations.

• Sentinel-5 UVNS sounder via Metop-SG-A1

  Sentinel-5 UVNS retrieves trace gas columns including NO2 and SO2.

• Earth Polychromatic Imaging Camera (EPIC) via DSCOVR

  EPIC UV channels support SO2 and ozone/aerosol products; no ozone-specific method exists.

• Environment Monitoring Instrument via Gaofen-5 (GF-5)

  EMI is a UV/VIS nadir imaging spectrometer with NO2 and SO2 column objectives.

• Geostationary Environment Monitoring Spectrometer (GEMS) via GEO-KOMPSAT-2B

  GEMS demonstrates geostationary tropospheric column mapping for air-quality species on GEO-KOMPSAT-2B.

• Geostationary Interferometric Infrared Sounder-2 via FY-4B

  WMO lists SO2 and NO2-related column variables among GIIRS-2 MWIR/TIR trace-gas retrieval capabilities.

• Prototype Geostationary Interferometric Infrared Sounder via FY-4A

  WMO lists SO2 and NO2-related column variables among GIIRS MWIR/TIR trace-gas retrieval capabilities.

• Total Anthropogenic and Natural emissions mapping SpectrOmeter-3 (TANSO-3) via GOSAT-GW (IBUKI GW)

  TANSO-3 uses its 0.45 micrometre band for NO2 retrieval alongside O2 and CO2/CH4 bands.

• Sentinel-4 UVN sounder via Meteosat Third Generation Sounder 1 (MTG-S1)

  Sentinel-4 produced preliminary NO2, SO2 and ozone imagery from MTG-S1 in October 2025; images are illustrative and not operational-use products.

None on record.