# OMI (Ozone Monitoring Instrument)
*sensor . products*

Nadir-viewing UV-VIS imaging spectrograph aboard Aura for daily global ozone, aerosol, cloud, NO2, SO2, formaldehyde, bromine monoxide, and other atmospheric chemistry retrievals.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: tno
- **sensor**: {"instrument_family":"passive-optical","measurement_principle":"passive","spectral_range_nm":{"min":270,"max":500},"spectral_band_count":1560,"gsd_m":{"native":13},"swath_km":2600,"channels":[{"name":"UV-1","spectral_range_nm":{"min":270,"max":314},"spectral_band_count":390},{"name":"UV-2","spectral_range_nm":{"min":306,"max":380},"spectral_band_count":390},{"name":"VIS","spectral_range_nm":{"min":350,"max":500},"spectral_band_count":780}],"notes":"Global-mode nadir pixel size is 13 x 24 km; gsd_m.native records the finer along-track dimension."}
- **entity type**: sensor
- **last verified date**: 2026-06-14
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: tno
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"tno","description":"Nadir-viewing UV-VIS imaging spectrograph aboard Aura for daily global ozone, aerosol, cloud, NO2, SO2, formaldehyde, bromine monoxide, and other atmospheric chemistry retrievals.","sensor":"{\"instrument_family\":\"passive-optical\",\"measurement_principle\":\"passive\",\"spectral_range_nm\":{\"min\":270,\"max\":500},\"spectral_band_count\":1560,\"gsd_m\":{\"native\":13},\"swath_km\":2600,\"channels\":[{\"name\":\"UV-1\",\"spectral_range_nm\":{\"min\":270,\"max\":314},\"spectral_band_count\":390},{\"name\":\"UV-2\",\"spectral_range_nm\":{\"min\":306,\"max\":380},\"spectral_band_count\":390},{\"name\":\"VIS\",\"spectral_range_nm\":{\"min\":350,\"max\":500},\"spectral_band_count\":780}],\"notes\":\"Global-mode nadir pixel size is 13 x 24 km; gsd_m.native records the finer along-track dimension.\"}"}
- **technology**: optical-spectral-sensing
- **relevance**: in-scope

## Editorial
OMI is the Ozone Monitoring Instrument flown on NASA's Aura mission for atmospheric chemistry observations [^knmi-omi][^wmo-omi]. It is a nadir-viewing ultraviolet-visible imaging spectrograph that measures backscattered solar radiation in three channel groups from 270 to 500 nm [^knmi-omi][^wmo-omi]. The UV-1 channel covers 270 to 314 nm, UV-2 covers 306 to 380 nm, and the visible channel covers 350 to 500 nm, giving about 1560 spectral samples across the instrument [^wmo-omi].

OMI is designed for daily global atmospheric monitoring rather than targeted high-resolution imaging. Its swath is about 2600 km, and global-mode nadir pixels are about 13 x 24 km [^knmi-omi]. The instrument supports ozone, aerosol, cloud, nitrogen dioxide, sulphur dioxide, formaldehyde, bromine monoxide, and related atmospheric chemistry retrievals from the Aura platform [^knmi-omi][^nasa-ntrs-omi]. For buyers comparing trace-gas archives, the value proposition is long-running public atmospheric composition data with global daily sampling and ultraviolet-visible sensitivity across key ozone and pollution bands [^knmi-omi][^nasa-ntrs-omi].

OMI was built by Dutch Space and TNO with Finnish subcontractors, and the catalogue manufacturer field uses the live TNO row for provider linkage [^knmi-omi]. Its measurement approach fits workflows that need continuity with Aura atmospheric products, especially retrieval chains that use solar backscatter in the ultraviolet and visible spectrum. Users should treat OMI as a chemistry and column-retrieval sensor, not a land-imaging payload: its spatial sampling, spectral layout, and mission design prioritize global atmospheric coverage over scene-level spatial detail [^knmi-omi][^wmo-omi].

## Compositional position
- aura (missions) --[mission_payloads]--> OMI (Ozone Monitoring Instrument)

## Sources
- [knmi-omi] | KNMI project page: Ozone Monitoring Instrument | https://www.knmiprojects.nl/projects/ozone-monitoring-instrument | tier=agency-doc | accessed=2026-06-14
- [wmo-omi] | WMO OSCAR instrument record: OMI | https://space.oscar.wmo.int/instruments/view/omi | tier=agency-doc | accessed=2026-06-14
- [nasa-ntrs-omi] | Science Objectives of EOS-Aura's Ozone Monitoring Instrument | https://ntrs.nasa.gov/citations/20020083310 | tier=agency-doc | accessed=2026-06-14

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Source: https://eo-atlas.org/products/sensor/omi
Maintainer: SpectraWorks B.V. (CC-BY 4.0)