ISPRS-Archives The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ISPRS-Archives Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. 2194-9034 Copernicus Publications Göttingen, Germany 10.5194/isprs-archives-XLII-3-1109-2018 IMPROVEMENTS TO THE RETRIEVAL OF NO<sub>2</sub> COLUMN FOR THE GOME-2 INSTRUMENT Liu S. 1 Valks P. 1 Pinardi G. 2 De Smedt I. 2 Yu H. 2 Beirle S. 3 Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Methodik der Fernerkundung (IMF), Oberpfaffenhofen, Germany Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium Max-Planck-Institut für Chemie (MPI-C), Mainz, Germany 30 04 2018 XLII-3 1109 1110 Copyright: © 2018 S. Liu et al. 2018 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://isprs-archives.copernicus.org/articles/XLII-3/1109/2018/isprs-archives-XLII-3-1109-2018.html The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XLII-3/1109/2018/isprs-archives-XLII-3-1109-2018.pdf

NO<sub>2</sub> is an important trace gas in both the stratosphere and troposphere. Since January 2007, the nadir-looking GOME-2 satellite instrument has been providing NO<sub>2</sub> data on a global scale which is of great interest for climate research and atmospheric chemistry studies. In this contribution, we report on an improved algorithm for the retrieval of total and tropospheric NO<sub>2</sub> columns from the GOME-2 instrument.