Challenges and Solutions for Frequency and Energy References for Spaceborne and Airborne Integrated Path Differential Absorption LidarsAndreas Fix, Mathieu Quatrevalet, Benjamin Witschas, Martin Wirth, Christian Büdenbender, Axel Amediek and Gerhard EhretEPJ Web of Conferences, 119 (2016) 06012DOI: https://doi.org/10.1051/epjconf/201611906012