THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Atmosphere >
Trace gases (excluding ozone) >
Atmospheric Chemistry - CH2O (column/profile)


Measurement Definition*: CH2O = HCHO = Formaldehyde. Requested in the troposphere (layers: LT, HT) + Total column - Physical unit: [ ppm ] for profile, units of [1.3×1015 molecules/cm2 ] for total column - Accuracy unit: [ % ] for profile, [1.3×1015 cm-2 ] for total column.
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
UVNS (Sentinel-5 precursor)
TROPOMI
Operational
Supporting atmospheric composition and air quality monitoring services.n/a
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.n/a
UVAS
UVAS (Ultraviolet Visible and near-infrared Atmospheric Sounder)
Being developed
High spatial resolution observations of air quality and climate gases such as ozone (O3), nitrogen dioxide (NO2), sulphur dioxide (SO2), formaldehyde (HCHO) glyoxal (CHO-CHO), and aerosols over selected zones of interest (urban and industrialized areas, mayor motorways, and special events like forest fires, volcano eruption and sand storms). Also measurements of halogenated compounds will be performed, including bromine monoxide (BrO) and iodine monoxide (IO).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 and CO.n/a
UVN
UV-VIS-NIR Sounder
Approved
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.n/a
UV Spectrometer (GACM)
UV Spectrometer (GACM)
Proposed
Daytime measurements of O3, NO2, SO2, CH2O, and aerosols.n/a
UV/Vis Near IR Wide Imaging Spectrometer (Geo-Cape)
UV/Vis Near IR Wide Imaging Spectrometer (Geo-Cape)
Proposed
Measures natural and human-produced gases and aerosols in the atmosphere, including those that react in sunlight to form polluting low-level ozone.n/a
UVN (Sentinel-4)
UV-visible- near infrared imaging spectrometer (Sentinel-4)
Proposed
Supporting atmospheric composition and air quality monitoring services.n/a
* Description adapted from WMO.
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