Optimization of the Photon Path Length Probability Density Function-Simultaneous (PPDF-S) Method and Evaluation of CO2 Retrieval Performance Under Dense Aerosol Conditions. - Chisa Iwasaki; Ryoichi Imasu; Andrey Bril; Sergey Oshchepkov; Yukio Yoshida; Tatsuya Yokota; Vyacheslav Zakharov; Konstantin Gribanov; Nikita Rokotyan (Sensors, 2019)