| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Trace gases (excluding ozone) >
HCHO Tropospheric Column
  | Measurement Definition*: 2D field of total amount of HCHO molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause - Measuring Units molecules.cm-2, Uncertainty Units %
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| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
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* Description adapted from WMO.
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