Methodology ยท Atmospheric spectroscopy
Tropospheric column mapping (NO2/SO2)
Maps tropospheric NO2 and SO2 column density from UV-VIS backscatter; good for urban air quality, shipping emissions, and volcanic SO2 tracking.
How it works
DOAS retrieval over UV-VIS (~310-490 nm) exploiting differential absorption structures. TROPOMI/Sentinel-5P is the operational benchmark at 3.5 x 5.6 km nadir resolution. [Wikipedia: Differential optical absorption spectroscopy](https://en.wikipedia.org/wiki/Differential_optical_absorption_spectroscopy)
Topics this serves
- Air quality well suited
- Geology and geohazards well suited
- Shipping emissions well suited
- Industrial emissions adequate
Existing implementations
No implementations recorded yet.
Related methodologies
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Retrieves vertical profiles of atmospheric composition (O3, H2O, NO2) from solar occultation or nadir radiance; good for air quality monitoring and stratospheric science.
Sources
- [wikipedia]Wikipedia: Differential optical absorption spectroscopycommunityaccessed 2026-05-22
Methodology
Edited from public sources. Last reviewed date pending by SpectraWorks editorial. See the data dictionary for field definitions.