Comparative satellite study reveals close agreement between EnMAP and Sentinel-5P water vapor retrievals over melting glaciers, suggesting hyperspectral data reduces retrieval variance.
The paper is aimed at the retrieval of total column water vapor (TCWV) over a melting glacier using high spatial resolution hyperspectral measurements performed by the German EnMAP (Environmental Mapping and Analysis Program) satellite. Such measurements are important for understanding the intra-pixel variability of water vapor satellite products with coarser spatial resolution especially in regions with drastic changes in the water vapor abundances. The retrieved TCWV is compared with that derived using other spaceborne optical measurements such as performed by Sentinel-5P. The close correspondence of both retrievals has been found with a smaller variance over derived EnMAP TCWV values.
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Kokhanovsky et al. (2026) studied this question.
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