QA4ECV NO2 tropospheric and stratospheric column data from GOME-2A

The QA4ECV NO2 Essential Climate Variable precursor product contains
harmonized vertical NO2 column data: tropospheric vertical column
densities and stratospheric vertical column densities.

The NO2 ECV precursor data in this dataset provides geophysical
information for ground pixels observed by the Global Ozone Monitoring
Experiment-2 (GOME-2, aboard the MetOp-A satellite; overpass time:
circa 09:30 hrs) for the period January 2007 onwards.

In addition to the vertical NO2 columns, the product contains
intermediate results, such as the result of the spectral fit,
fitting diagnostics, the averaging kernel, cloud information,
and algorithm and product uncertainty estimates.