Bingqiang Sun is an Assistant Research Scientist in the Department of Atmospheric Sciences at Texas A&M University, College Station, TX, USA. He has published 10 journal papers. He received a B.S. degree from Shandong Normal University, Shandong, China, in 2007, M.S. degree from Peking University, Beijing, China, in 2010, and Ph.D. degree from the Department of Physics & Astronomy at Texas A&M University in 2014. He received the Yuxiang Young Scholar Award by Chinese-American Oceanic and Atmospheric Association (COAA) in 2017. Dr. Lei Bi has made significant contributions to improvements in the invariant imbedding T-matrix method, particularly when he worked in the Department of Atmospheric Sciences at Texas A&M University, College Station, Texas, United States as an Assistant Research Scientist. He has published 47 journal papers and 2 book chapters. He received his BS and MS degrees from Anhui Normal University and Beijing Normal University, China, in 2003 and 2006, respectively, and a PhD degree from Texas A&M university, Texas, United States, in 2011. Dr. Bi is a recipient of the Richard Goody Award by Elsevier and the Journal of Quantitative Spectroscopy and Radiative Transfer (JQSRT). He serves as an Associate Editor of the JQSRT and an editor of the Asia-pacific Journal of Atmospheric Sciences. Ping Yang is Professor in the Department of Atmospheric Sciences at Texas A&M University, College Station, TX and the David Bullock Harris Chair in Geosciences. Yang has published 309 journal papers, 11 book chapters, and 3 books. He received B.S. and M.S. degrees from Lanzhou University and Lanzhou Institute of Plateau Atmospheric Physics/Chinese Academy of Sciences, Lanzhou, China, in 1985 and 1988, respectively, and a Ph.D. degree from the University of Utah, Salt Lake City, UT, USA, in 1995. Yang is a Fellow of the Optical Society of America (OSA), American Geophysical Union (AGU), and American Meteorological Society (AMS). Michael Kahnert is an adjunct professor at the Department of Space, Earth and Environment at Chalmers University of Technology, Gothenburg, Sweden, and research leader for aerosols and radiation at the Swedish Meteorological and Hydrological Institute. He has published 1 book, several book chapters, and 75 journal papers. He received his M.S. degrees in Physics at the Free University of Berlin, Germany, in 1994, his Ph.D. degree at the University of Alaska Fairbanks, USA, in 1998, and his Habilitation degree at Chalmers University of Technology, Gothenburg, Sweden, in 2010. Kahnert presently serves on the editorial board of JQSRT and of Scientific Reports. George Kattawar is Professor Emeritus in the Department of Physics and Astronomy and the Institute for Quantum Science and Engineering at Texas A&M University, College Station, TX. He has published 235 journal papers, 3 book chapters, and1 book. He received a B.S. from Lamar University (Highest Honors) and the M.S. and Ph.D. from Texas A&M University in 1961 and 1964 respectively. Kattawar won the Distinguished Texas Scientist Award in 2011, the Jerlov Award in 2014, and the van de Hulst Light Scattering Award in 2015. He is a Fellow of the Optical Society of America (OSA).