THE CEOS DATABASE : Missions, Instruments and Measurements
Measurements > Atmosphere >
Trace gases (excluding ozone) >
NO2 Mole Fraction

Measurement Definition*: 3D field of amount of NO2 (Nitrogen peroxide, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Resolution Units km CO2 = Carbon dioxide. Requested from surface to TOA (layers: LT, HT, LS, HS&M) + Total column - Measuring Units, Uncertainty Units %, Physical unit [ ppm ], Accuracy unit: [ % ]
Instrument DescriptionMeasurement TechnologyTimeline
Atmospheric Chemistry Experiment (ACE) Fourier Transform Spectrometer
Measure and understand the chemical processes that control the distribution of ozone in the Earth's atmosphere, especially at high altitudes.Limb-scanning IR spectrometer
Geostationary Environment Monitoring Spectrometer
Measurements of atmospheric chemistry, precursors of aerosols and ozone in particular, in high temporal and spatial resolution over Asia.n/a
Lightning Mapping Imager
Lightning mapping for locating thunder storms in flooding season, CCD camera operating 0.77 µm to count flashes and intensity.n/a
Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation
Chemical processes involved in the depletion of the ozone layer, and now including a high quality water vapour data product.Limb-scanning SW spectrometer
Optical Spectrograph and Infra-Red Imaging System
Detects aerosol layers and abundance of species such as O3, NO2, OClO, BrO and NO. Consists of spectrograph and IR imager.Limb-scanning SW spectrometer
Stratospheric Aerosol and Gas Experiment
Limb-viewing measurements of aerosol, O3, H20, NO2, OClO, NO3, temperature and pressure in the stratosphere, upper troposphere, and mesosphere using solar occultation, lunar occultation and limb scatter measurement techniques.Limb-scanning SW spectrometer
UVNS (Sentinel-5 precursor)
Supporting atmospheric composition and air quality monitoring services.High-resolution nadir-scanning SW spectrometer
Integrated CO2 & NO2 Imaging spectrometer
Being developed
Pushbroom scanning spectrometer to provide relatively high spatial resolution CO2, CH4 and NO2 observations in support of estimating anthropogenic emissions of CO2 and CH4 in Copernicus. In addition, high quality NO2 and solar-induced fluorescence will be operationally delivered.High-resolution nadir-scanning SW spectrometer
Spectrometer (TEMPO)
Spectrometer (TEMPO)
Being developed
Hourly measurements of air pollution over North America, from Mexico City to the Canadian oil sands, at high spatial resolution. Measurements in ultraviolet and visible wavelengths will provide a suite of products including the key elements of tropospheric air pollution chemistry. Will be part of the first global geostationary constellation for pollution monitoring, along with European and Korean missions now in development.High-resolution nadir-scanning SW spectrometer
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.High-resolution nadir-scanning SW spectrometer
UV-VIS-NIR Sounder
Measurements of atmospheric trace gases, mainly O3, NO2, SO2, H2CO. The product list is not yet approved, the accuracy summary column lists the breakthrough user requirements.High-resolution nadir-scanning SW spectrometer
UVN (Sentinel-4)
UV-visible- near infrared imaging spectrometer (Sentinel-4)
Supporting atmospheric composition and air quality monitoring services.High-resolution nadir-scanning SW spectrometer
High Resolution Dynamics Limb Sounder
No longer operational
Measures atmospheric temperature, concentrations of ozone, water vapour, methane, NOx, N2O, CFCs and other minor species, aerosol concentration, location of polar stratospheric clouds and cloud tops. Currently not collecting data on Aqua.Limb-scanning IR spectrometer
* Description adapted from WMO.
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