EO·Atlas
Environment Monitoring Instrument
UV/VIS grating imaging spectrometer on GF-5 for ozone, NO2, SO2, HCHO and aerosol column monitoring, with four bands from 240 to 790 nm, 1536 channels, daily daylight coverage, and 13 x 48 km resolution.
Environment Monitoring Instrument (EMI) is an operational UV/VIS grating imaging spectrometer on GF-5 for ozone, nitrogen dioxide, sulfur dioxide, formaldehyde, and aerosol column or profile observations.[1][2] Its broad spectral envelope is 240-790 nm across four bands and 1536 channels, while peer-reviewed first-observation work reports 240-710 nm for the GF-5 configuration.[1][2]
EMI has a 2500 km swath and 13 km by 48 km ground sampling, with daily daylight global coverage documented for the instrument characteristics.[1] Tropospheric nitrogen dioxide and sulfur dioxide column retrieval is demonstrated on Gaofen-5.[1] The instrument supports wide-swath atmospheric-composition monitoring where UV/VIS trace-gas sensitivity, daily daylight coverage, and moderate spatial sampling are more important than fine-resolution imaging.[1][2]
Compositional position
- Tropospheric column mapping (NO2/SO2)via Gaofen-5 (GF-5)
EMI is a UV/VIS nadir imaging spectrometer with NO2 and SO2 column objectives.
None on record.
- [1]WMO OSCAR instrument record: EMIagency doc-2026-06-16
- [2]First observation of tropospheric nitrogen dioxide from the Environmental Trace Gases Monitoring Instrument onboard the GaoFen-5 satellitepeer reviewed-2026-06-16
- [3]Mission Overview GaoFen-5, CEOS AC-VC-12 presentationagency doc2016-10-132026-06-16