| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Trace gases (excluding ozone) >
HNO3 Mole Fraction
  | Measurement Definition*: 3D field of amount of HNO3 (Nitric acid, 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 |
GXS
GeoXO Sounder | Being developed
| | n/a | |
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* Description adapted from WMO.
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