Oh (Column/Profile)
Measurement Instruments
Measurement Definition: OH = Hydroxil radical. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ].
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
| MLS (EOS-Aura) | Operational | Measures lower stratospheric temperature and concentration of H2O, O3, ClO, HCl, OH, HNO3, N2O and SO2. | Limb-scanning MW spectrometer |  |