Airborne Two-Micron Double-Pulse IPDA Lidar Validation for Carbon Dioxide Measurements Over LandTamer F. Refaat, Upendra N. Singh, Jirong Yu, Mulugeta Petros, Ruben Remus and Syed IsmailEPJ Web Conf., 176 (2018) 05001DOI: https://doi.org/10.1051/epjconf/201817605001