De Smedt I, YU H, Richter A, Beirle S, Eskes H, Boersma KF, et al. QA4ECV HCHO tropospheric column L2 data from GOME-2 [Internet]. Royal Belgian Institute for Space Aeronomy; 2017. Available from: https://data.aeronomie.be/dataset/6881151f-fa1c-4db2-9df5-c9009161ebe1