Articles | Volume 15, issue 11 
            
                
                    
            
            
            https://doi.org/10.5194/amt-15-3401-2022
                    © Author(s) 2022. This work is distributed under 
the Creative Commons Attribution 4.0 License.
                the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-15-3401-2022
                    © Author(s) 2022. This work is distributed under 
the Creative Commons Attribution 4.0 License.
                the Creative Commons Attribution 4.0 License.
Retrieval of greenhouse gases from GOSAT and GOSAT-2 using the FOCAL algorithm
Stefan Noël
CORRESPONDING AUTHOR
                                            
                                    
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Maximilian Reuter
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Michael Buchwitz
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Jakob Borchardt
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Michael Hilker
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Oliver Schneising
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Heinrich Bovensmann
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    John P. Burrows
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Antonio Di Noia
                                            Earth Observation Science, University of Leicester, LE1 7RH,
Leicester, UK
                                        
                                    Robert J. Parker
                                            Earth Observation Science, University of Leicester, LE1 7RH,
Leicester, UK
                                        
                                    
                                            National Centre for Earth Observation, University of Leicester, Leicester, UK
                                        
                                    Hiroshi Suto
                                            Japan Aerospace Exploration Agency (JAXA), 305-8505, Tsukuba, Japan
                                        
                                    Yukio Yoshida
                                            National Institute for Environmental Studies (NIES), Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan
                                        
                                    Matthias Buschmann
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Nicholas M. Deutscher
                                            Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, NSW 2522, Wollongong, Australia
                                        
                                    Dietrich G. Feist
                                            Max Planck Institute for Biogeochemistry, 07745 Jena, Germany
                                        
                                    
                                            Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, 82234 Oberpfaffenhofen, Germany
                                        
                                    
                                            Ludwig-Maximilians-Universität München, Lehrstuhl für Physik der Atmosphäre, 80539 Munich, Germany
                                        
                                    David W. T. Griffith
                                            Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, NSW 2522, Wollongong, Australia
                                        
                                    Frank Hase
                                            Karlsruhe Institute of Technology, IMK-ASF, 76021 Karlsruhe, Germany
                                        
                                    Rigel Kivi
                                            Finnish Meteorological Institute, Space and Earth Observation Centre, Tähteläntie 62, 99600 Sodankylä, Finland
                                        
                                    Cheng Liu
                                            Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, 230026 Hefei, China
                                        
                                    Isamu Morino
                                            National Institute for Environmental Studies (NIES), Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan
                                        
                                    Justus Notholt
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    Young-Suk Oh
                                            Global Atmosphere Watch Team, Innovative Meteorological Research Department, National Institute of Meteorological Sciences, 3 Seohobuk-ro, Seogwipo-si, Jeju-do, Republic of Korea
                                        
                                    Hirofumi Ohyama
                                            National Institute for Environmental Studies (NIES), Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan
                                        
                                    Christof Petri
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    David F. Pollard
                                            National Institute of Water and Atmospheric Research Ltd (NIWA), Lauder, Private Bag 50061, Omakau 9352, New Zealand
                                        
                                    Markus Rettinger
                                            Karlsruhe Institute of Technology, IMK-IFU, 82467 Garmisch-Partenkirchen, Germany
                                        
                                    Coleen Roehl
                                            California Institute of Technology, Global Environmental
Center, Pasadena, CA 91125, USA
                                        
                                    Constantina Rousogenous
                                            Climate and Atmosphere Research Center (CARE-C), The Cyprus Institute, Nicosia, Cyprus
                                        
                                    Mahesh Kumar Sha
                                            Royal Belgian Institute for Space Aeronomy (BIRA-IASB), 1180 Brussels, Belgium
                                        
                                    Kei Shiomi
                                            Japan Aerospace Exploration Agency (JAXA), 305-8505, Tsukuba, Japan
                                        
                                    Kimberly Strong
                                            Department of Physics, University of Toronto, Toronto, ON, M5S 1A7, Canada
                                        
                                    Ralf Sussmann
                                            Karlsruhe Institute of Technology, IMK-IFU, 82467 Garmisch-Partenkirchen, Germany
                                        
                                    
                                            Laboratoire d'Etudes du Rayonnement et de la Matière en
Astrophysique et Atmosphères (LERMA-IPSL), Sorbonne Université,
CNRS, Observatoire de Paris, PSL Université, 75005 Paris, France
                                        
                                    Voltaire A. Velazco
                                            Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, University of Wollongong, NSW 2522, Wollongong, Australia
                                        
                                    
                                            Deutscher Wetterdienst, Meteorological Observatory, 82383 Hohenpeissenberg, Germany
                                        
                                    Mihalis Vrekoussis
                                            Climate and Atmosphere Research Center (CARE-C), The Cyprus Institute, Nicosia, Cyprus
                                        
                                    
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
                                    
                                            Center of Marine Environmental Sciences (MARUM), University of Bremen, Bremen, Germany
                                        
                                    Thorsten Warneke
                                            Institute of Environmental Physics, University of Bremen,
FB 1, P.O. Box 330440, 28334 Bremen, Germany
                                        
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                            Cited
30 citations as recorded by crossref.
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- Global Methane Budget 2000–2020 M. Saunois et al. 10.5194/essd-17-1873-2025
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- Global Carbon Monoxide Column Derived from HIRAS-II/FY-3F Satellite Observations M. Zhou et al. 10.1007/s00376-025-5016-2
- Diurnal Carbon Monoxide Retrieval from FY-4B/GIIRS Using a Novel Machine Learning Method Z. Liang et al. 10.34133/remotesensing.0289
- Advances in retrieving XCH4 and XCO from Sentinel-5 Precursor: improvements in the scientific TROPOMI/WFMD algorithm O. Schneising et al. 10.5194/amt-16-669-2023
- A study of measurement scenarios for the future CO2M mission: avoidance of detector saturation and the impact on XCO2 retrievals M. Weimer et al. 10.5194/amt-18-3321-2025
- Predictions of failed satellite retrieval of air quality using machine learning E. Malina et al. 10.5194/amt-18-1689-2025
- Improving Methane Point Sources Detection Over Heterogeneous Land Surface for Satellite Hyperspectral Imagery E. Sun et al. 10.1109/JSTARS.2024.3482278
- Local and regional enhancements of CH4, CO, and CO2 inferred from TCCON column measurements K. Mottungan et al. 10.5194/amt-17-5861-2024
- Quantifying methane emissions from the global scale down to point sources using satellite observations of atmospheric methane D. Jacob et al. 10.5194/acp-22-9617-2022
- Updating the carbon dioxide line list in HITEMP R. Hargreaves et al. 10.1016/j.jqsrt.2024.109324
- 大气环境监测卫星星载IPDA激光雷达的大气二氧化碳柱浓度反演及多源数据对比验证 赖. Lai Kaijie et al. 10.3788/AOS231797
- Retrieving the atmospheric concentrations of carbon dioxide and methane from the European Copernicus CO2M satellite mission using artificial neural networks M. Reuter et al. 10.5194/amt-18-241-2025
- A nonlinear data-driven approach to bias correction of XCO2 for NASA's OCO-2 ACOS version 10 W. Keely et al. 10.5194/amt-16-5725-2023
- TROPESS-CrIS CO single-pixel vertical profiles: intercomparisons with MOPITT and model simulations for 2020 western US wildfires M. Luo et al. 10.5194/amt-17-2611-2024
- Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates S. Noël et al. 10.5194/amt-17-2317-2024
- Multi-sensor integrated mapping of global XCO2 from 2015 to 2021 with a local random forest model J. Chen et al. 10.1016/j.isprsjprs.2024.01.009
- Quantification of CO2 Emissions from Three Power Plants in China Using OCO-3 Satellite Measurements Y. Yang et al. 10.1007/s00376-024-3293-9
- Evaluating the performance of carbon dioxide and methane observations from carbon-monitoring satellite products over China X. Hong et al. 10.1016/j.scitotenv.2024.176896
- Assessing the impact of natural factors on CH₄ concentrations in Chinese cities from 2009 to 2023 Z. Linjing et al. 10.1080/01431161.2025.2526004
- Methane Retrieval Algorithms Based on Satellite: A Review Y. Jiang et al. 10.3390/atmos15040449
- Global carbon monoxide retrieval from the hyperspectral infrared atmospheric sounder-II onboard FengYun-3E in a dawn-dusk sun-synchronous orbit Z. Zeng 10.1016/j.jqsrt.2024.109336
- Assessing the impact of pre-monsoon forest fires on air quality in the Central Himalayas using satellite observations and trajectory modelling N. Singh et al. 10.1080/01431161.2025.2572733
- Seasonal and Diurnal Variations in XCO2 Characteristics in China as Observed by OCO‐2/3 Satellites: Effects of Land Cover and Local Meteorology H. Zhao et al. 10.1029/2023JD038841
- 基于国产碳卫星的在轨光谱性能评估及大气二氧化碳的高精度反演(特邀) 洪. Hong Xinhua et al. 10.3788/AOS241153
- Diurnal carbon monoxide observed from a geostationary infrared hyperspectral sounder: first result from GIIRS on board FengYun-4B Z. Zeng et al. 10.5194/amt-16-3059-2023
- Based on the Feedforward Inputs Obtained by the Intelligent Algorithm the Moving Mirror Control System of the Fourier Transform Spectrometer Y. Huang et al. 10.3390/electronics12224568
- 基于卡尔曼平滑算法重建高时空分辨率星载IPDA激光雷达XCO2观测的方法研究 樊. Fan Zengchang et al. 10.3788/AOS241804
- First TanSat CO2 retrieval over land and ocean using both nadir and glint spectroscopy X. Hong et al. 10.1016/j.rse.2024.114053
- 大气甲烷卫星传感器和遥感算法研究综述 何. He Zhuo et al. 10.3788/AOS230429
- The Greenhouse gas Observations of Biospheric and Local Emissions from the Upper sky (GOBLEU): a mission overview, instrument description, and results from the first flight H. Suto et al. 10.1186/s13021-024-00273-1
- Global Methane Budget 2000–2020 M. Saunois et al. 10.5194/essd-17-1873-2025
Latest update: 30 Oct 2025
Short summary
            We present a new version (v3) of the GOSAT and GOSAT-2 FOCAL products.
In addition to an increased number of XCO2 data, v3 also includes products for XCH4 (full-physics and proxy), XH2O and the relative ratio of HDO to H2O (δD). For GOSAT-2, we also present first XCO and XN2O results. All FOCAL data products show reasonable spatial distribution and temporal variations and agree well with TCCON. Global XN2O maps show a gradient from the tropics to higher latitudes on the order of 15 ppb.
            We present a new version (v3) of the GOSAT and GOSAT-2 FOCAL products.
In addition to an...
            
         
 
                             
                             
             
             
            