Aerosol mass mixing ratio | 5 - marginal | Limited to high atmosphere.. Daylight only. | UV, VIS, NIR spectrometry |
Atmospheric temperature | 4 - fair | Limited to high atmosphere.. Daylight only. | UV, VIS and NIR spectrometry at higher spectral resolution < 1.5 nm |
BrO* | 3 - high | Limited to high atmosphere.. Daylight only. | UV spectrometry. BrO lines around 300 nm. Limb sounding mechanically or electronically |
HCHO* | 3 - high | Limited to high atmosphere.. Daylight only. | UV spectrometry. HCHO lines around 350 nm. Limb sounding mechanically or electronically |
ClO* | 3 - high | Limited to high atmosphere.. Daylight only. | UV Spectrometry. ClO lines around 300 nm. |
NO* | 4 - fair | Limited to high atmosphere.. Daylight only. | UV spectrometry. NO lines around 250 nm. |
NO2* | 4 - fair | Limited to high atmosphere.. Daylight only. | UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm. |
O3* | 4 - fair | Limited to high atmosphere.. Daylight only. | UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis). |
PSC occurrence | 4 - fair | Limited to high atmosphere.. Daylight only. | UV and VIS spectrometry. |
SO2* | 4 - fair | Limited to high atmosphere.. Daylight only. | UV spectrometry. SO2 lines around 350 nm. |
Specific humidity | 4 - fair | Limited to high atmosphere.. Daylight only. | UV, VIS and NIR spectrometry with several water vapour bands (main: around 940 nm). |
Aerosol volcanic ash | 5 - marginal | Limited to high atmosphere.. Daylight only. | UV, VIS and NIR spectrometry; |