| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Trace gases (excluding ozone) >
NH3 Total Column
  | Measurement Definition*: 2D field of total amount of NH3 molecules (Ammonia) per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere. |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
GXS
GeoXO Sounder | Being developed
| | n/a | |
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* Description adapted from WMO.
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