Jhoon Kim¹, Dongwon Lee², Myoung-Hwan Ahn³, Jae H Kim⁴, Rokjin Park⁵, Hanlim Lee⁶, Chul H. Song⁷, Yong-Sang Choi³, Kwon Ho Lee⁸, Jungmoon Yoo³, Seon K Park³, Kwang-Mog Lee⁹, Chang-Keun Song¹⁰, Sang-Woo Kim⁵, Si-Wan Kim¹, Jongmin Yoon², Won-Jin Lee², Hyunkee Hong², Chang-Suk Lee¹¹, Wonjun Choi², Yuha Kim¹¹, Kyung-Jung Moon², Dai Ho Ko¹², Seung-Hoon Lee¹³, Heesung Chong¹, Sujung Go^14,15, Sang Seo Park¹⁶, Yeseul Cho¹⁷, Hana Lee¹⁴, Seoyoung Lee¹⁴, Mina Kang¹⁸, Mijin Eo³, Juseon Bak¹⁹, Kanghyun Baek⁴, Hyeonsic Nam⁴, Hyeong-Ahn Kwon²⁰, Jiwon Yang⁶, Junsung Park⁶, Kyung Man Han²¹, Mikyung CHOI²², Haklim Choi⁹, Ebony Lee¹⁸, Gyuyeon Kim³, Yesol CHA¹⁶, Xiong Liu¹⁹, Kelly Chance¹⁹, Joris P Veefkind²³, Jassim A Al-Saadi²⁴, Ben Veihelmann²⁵ and GEMS Science Team, (1)Yonsei University, Department of Atmospheric Sciences, Seoul, Korea, Republic of (South), (2)National Institute of Environmental Research, Environmental Satellite Center, Incheon, South Korea, (3)Ewha Womans University, Seoul, South Korea, (4)Pusan National University, Busan, South Korea, (5)Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea, (6)Pukyong National University, Busan, South Korea, (7)GIST Gwangju Institute of Science and Technology, School of Earth Sciences and Environmental Engineering, Gwangju, South Korea, (8)Gangneung-Wonju National University, Gangneung, Korea, Republic of (South), (9)Kyungpook National University, Astronomy and Atmospheric Sciences, Daegu, Korea, Republic of (South), (10)Ulsan National Institute of Science and Technology, Ulsan, Korea, Republic of (South), (11)National Institute of Environmental Research, Environmental Satellite Center, Inchon, South Korea, (12)Korea Aerospace Research Institute, Daejeon, Korea, Republic of (South), (13)Korea Aerospace Research Institute, Daejeon, South Korea, (14)Yonsei University, Seoul, Korea, Republic of (South), (15)UMBC, Baltimore, United States, (16)Ulsan National Institute of Science and Technology, Ulsan, South Korea, (17)Yonsei University, Seoul, South Korea, (18)Ewha Womans University, Seoul, Korea, Republic of (South), (19)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States, (20)Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), (21)GIST Gwangju Institute of Science and Technology, Gwangju, Korea, Republic of (South), (22)Gangneung Wonju National University, Gangneung, South Korea, (23)Royal Netherlands Meteorological Institute, De Bilt, 3730, Netherlands, (24)NASA Langley Research Center, Hampton, VA, United States, (25)ESA-ESTEC, Noordwijk, Netherlands

Junsung Park¹, Hyunkee Hong², Hanlim Lee³, Jhoon Kim⁴ and Dongwon Lee², (1)Pukyong National University, Busan, Korea, Republic of (South), (2)National Institute of Environmental Research, Environmental Satellite Center, Incheon, South Korea, (3)Pukyong National University, Busan, South Korea, (4)Yonsei University, Department of Atmospheric Sciences, Seoul, South Korea

Xiaoyi Zhao¹, Debora Griffin¹, Vitali E. Fioletov¹, Chris A McLinden¹, Alexander Cede², Martin Tiefengraber³, Moritz Mueller³, Kristof Bognar⁴, Kimberly Strong⁵, Folkert Boersma⁶, Henk Eskes⁷, Jonathan Davies¹, Akira Ogyu⁸, Sum Chi Lee⁸ and Dan Weaver⁹, (1)Environment and Climate Change Canada, Air Quality Research Division, Toronto, ON, Canada, (2)LuftBlick, Innsbruck, Austria, (3)LuftBlick, Mutters, Austria, (4)University of Toronto, Physics, Toronto, Canada, (5)University of Toronto, Department of Physics, Toronto, ON, Canada, (6)KNMI, Brussels, Belgium, (7)Royal Netherlands Meteorological Institute, De Bilt, 3730, Netherlands, (8)Environment and Climate Change Canada, Air Quality Research Division, Toronto, Canada, (9)University of Toronto, Toronto, ON, Canada

Andreas Richter, Kezia Lange, Miriam Latsch and John Philip Burrows FRS, University of Bremen, Institute of Environmental Physics, Bremen, Germany

Jennifer Grant, University of California, Berkeley, Department of Mathematics, Berkeley, CA, United States, Hannah Schaefer Kenagy, University of California, Berkeley, Department of Chemistry, Berkeley, CA, United States, Qindan Zhu, University of California, Berkeley, Department of Earth and Planetary Sciences, Berkeley, CA, United States and Ronald C Cohen, University of California, Berkeley, Dept. of Earth and Planetary Science, Berkeley, CA, United States; University of California, Berkeley, Dept. of Chemistry, Berkeley, CA, United States

Caroline R Nowlan¹, Gonzalo Gonzalez Abad¹, Lei Zhu^2,3, Christopher Chan Miller¹, Kelly Chance¹, Lawrence E Flynn⁴, Glen R Jaross⁵, Yeonjin Jung¹, Hyeong-Ahn Kwon⁶, Ewan O'Sullivan¹, Colin J Seftor⁷ and Amir Souri¹, (1)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States, (2)Harvard University, John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (3)Southern University of Science and Technology, School of Environmental Science and Engineering, Shenzhen, China, (4)NOAA Center for Satellite Applications and Reserch, STAR, College Park, MD, United States, (5)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (6)Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), (7)NASA Goddard SFC, Greenbelt, MD, United States

David P Haffner^1,2, Quintus Kleipool³, Nico Rozemeijer³, Joanna Joiner², Glen R Jaross⁴, Mirna van Hoek³, Antje Ludewig³, Nickolay Anatoly Krotkov⁴, Omar Torres⁴, Jonatan Leloux³, Mark ter Linden³, Emiel van der Plas³, Erwin Loots³, Sergey V Marchenko⁵, Lok N Lamsal⁶, Can Li^2,7, Zachary Fasnacht¹, Ramaswamy Tiruchirapalli¹, Alexander P Vasilkov¹, Nick Gorkavyi¹, Natalya A Kramarova⁴, Jerald R Ziemke⁸, Hiren T Jethva^4,9, Changwoo Ahn⁵, Wenhan Qin⁵, Bradford L Fisher¹⁰, Eun-Su Yang⁵, Sungyeon Choi¹⁰, Yasuko Yoshida¹⁰, Fei Liu^4,11, Joris P Veefkind^12,13, Pieternel Levelt^13,14, Johanna Tamminen¹⁵ and Seppo Hassinen¹⁶, (1)Science Systems and Applications, Inc., Lanham, MD, United States, (2)NASA GSFC, Greenbelt, MD, United States, (3)Royal Netherlands Meteorological Institute, De Bilt, Netherlands, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (5)SSAI, Lanham, MD, United States, (6)NASA Goddard Space Flight Ctr., Greenbelt, MD, United States, (7)Earth System Science Interdisciplinary Center, College PARK, MD, United States, (8)NASA Goddard SFC, Greenbelt, MD, United States, (9)Universities Space Research Association, Columbia, MD, United States, (10)SSAI, Greenbelt, MD, United States, (11)Universities Space Research Association Greenbelt, Greenbelt, MD, United States, (12)Royal Netherlands Meteorological Institute, De Bilt, 3730, Netherlands, (13)Delft University of Technology, Delft, Netherlands, (14)Royal Netherlands Meteorological Instiute, De Bilt, Netherlands, (15)Finnish Meteorological Inst., Helsinki, Finland, (16)Finnish Meteorological Institute, Helsinki, Finland

Aaron Naeger¹, Mike Newchurch², C Thomas Moore³, Kelly Chance⁴ and Xiong Liu⁴, (1)University of Alabama in Huntsville, Huntsville, AL, United States, (2)Univ of Alabama Huntsville, Huntsville, AL, United States, (3)Western States Air Resources Council, Cooperative Institute for Research in the Atmosphere, Fort Collins, CO, United States, (4)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States