Hdo (Column/Profile)
Measurement Instruments
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
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
| TANSO-FTS | Operational | CO2 and CH4 distribution. | n/a |  |
| TANSO-FTS-2 | Operational | CO2, CH4, and CO distribution. | n/a | |
| TES | 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 | |