| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Trace gases (excluding ozone) >
HCHO Mole Fraction
  | Measurement Definition*: 3D field of amount of HCHO (Formaldehyde, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles). |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
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 | |
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 | |
GHMS
Geostationary HiMawari Sounder | Approved
| | 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 | |
UVN (Sentinel-4)
UV-visible- near infrared imaging spectrometer (Sentinel-4) | Proposed
| Supporting atmospheric composition and air quality monitoring services. | n/a | |
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* Description adapted from WMO.
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