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CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Atmosphere >
Trace gases (excluding ozone) >
HDO (column/profile)

Measurement Definition*: HDO = Water vapour (with one hydrogen nucleus replaced by its deuterium isotope). Requested from low stratosphere to TOA (layers: LS and HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ].

Thematic Links
InstrumentStatus/
Accuracy		Instrument DescriptionMeasurement TechnologyTimeline
TANSO-FTS
Thermal And Near infrared Sensor for carbon Observation - Fourier Transform Spectrometer		Operational
CO2 and CH4 distribution.n/a
TANSO-FTS-2
Thermal And Near infrared Sensor for carbon Observation - Fourier Transform Spectrometer-2		Operational
CO2, CH4, and CO distribution.n/a
TANSO-3
Total Anthropogenic and Natural emissions mapping SpectrOmeter-3		Being developed
 n/a
TES
Tropospheric Emission Spectrometer		No longer operational
3D profiles on a global scale of all infra-red active species from surface to lower stratosphere. Measures greenhouse gas concentrations, tropospheric ozone, acid rain precursors, gas exchange leading to stratospheric ozone depletion.n/a
* Description adapted from WMO.
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