“…TROPOMI data are still evaluated by scientists and engineers, and new challenges opened new opportunities in Earth Observation. One of them is the dramatic COVID-19 outbreak, which started in February to March 2020, as an unprecedented situation for society and economy, from the global level [93] down to regional, local, and even individual ones [94]. Beyond the public health system difficulties and disasters around the world, economic activities and traffic adapted to the new context of the temporary closing of businesses, educational facilities, plants and factories, traffic restrictions, etc., leading to an abrupt change in economic evolution [95], with a profound impact on financial markets [96,97], from the oil prices and banking sector decrease to the reduction of the ability of different state authorities to provide a normal and efficient economic and social system management as well as to the maintenance of vital infrastructures.…”