CO2 mole fraction* | 4 - fair | Limited to high atmosphere. | MWIR and TIR spectrometry. CO2 lines around 4.3 and 15 micrometers. Limb sounding by solar occultation. Self-calibrating |
C2H2* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. C2H2 lines around 7.5 and 13.7 micrometers. Limb sounding by solar occultation. Self-calibrating |
C2H6* | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. C2H6 lines around 3.3 and 12 micrometers. Limb sounding by solar occultation. Self-calibrating |
CFC-11* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. CFC-11 lines around 9.2 and 11.7 micrometers Limb sounding by solar occultation. Self-calibrating |
CFC-12* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. CFC-12 lines around 8.8 and 10.8 micrometers. Limb sounding by solar occultation. Self-calibrating |
CH4 mole fraction* | 5 - marginal | Limited to high atmosphere. | SWIR, MWIR and TIR spectrometry. CH4 lines around 2.3, 4.3 and 7.7 micrometers. Limb sounding by solar occultation. Self-calibrating |
ClONO2* | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. ClONO2 lines around 5.7, 7.7 and 12.5 micrometers. Limb sounding by solar occultation. Self-calibrating |
CO* | 5 - marginal | Limited to high atmosphere. | SWIR and MWIR spectrometry. CO lines around 2.3 and 4.6 micrometers. Limb sounding by solar occultation. Self-calibrating |
COS* | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. COS lines around 4.8 and 11.6 micrometers. Limb sounding by solar occultation. Self-calibrating |
HNO3* | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. HNO3 lines around 5.9, 7.6 and 11.3 micrometers. Limb sounding by solar occultation. Self-calibrating |
N2O mole fraction* | 5 - marginal | Limited to high atmosphere. | SWIR, MWIR and TIR spectrometry. N2O lines around 2.3, 4.5 and 7.7 micrometers. Limb sounding by solar occultation. Self-calibrating |
N2O5* | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. N2O5 lines around 5.8 and 8 micrometers. Limb sounding by solar occultation. Self-calibrating |
PAN* | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. PAN lines around 5.7, 8.6 and 12.5 micrometers. Limb sounding by solar occultation. Self-calibrating |
SF6* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. SF6 lines around 10.5 micrometers. Limb sounding by solar occultation. Self-calibrating |
Specific humidity | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry in the water vapour band around 6.3 micrometers Limb sounding by solar occultation, Self-calibrating |
H2O* | 5 - marginal | Limited to high atmosphere. | MWIR/TIR spectrometry in a range centred on 6.3 micrometers. Limb sounding by solar occultation. Self-calibrating |
NO* | 5 - marginal | Limited to high atmosphere. | MWIR spectrometry. NO lines around 5.3 micrometers. Limb sounding by solar occultation. Self-calibrating |
NO2* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. NO2 lines around 6.1 micrometers. Limb sounding by solar occultation. Self-calibrating |
O3* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. Ozone band around 9.7 micrometers. Limb sounding by solar occultation. Self-calibrating |
PSC occurrence | 5 - marginal | Limited to high atmosphere. | MWIR and TIR spectrometry. Limb sounding by solar occultations. Self-calibrating |
SO2* | 5 - marginal | Limited to high atmosphere. | TIR spectrometry. SO2 lines around 7.3 and 8.6 micrometers. Limb sounding by solar occultation. Self-calibrating |
Atmospheric temperature | 5 - marginal | Limited to high atmosphere. | MWIR, TIR limb sounding by solar occultation. Self-calibrating |