Presolicitation NASA 4X4 TEST PROGRAM by the Department of NASA is seeking one lot of Mecury Cadmium Telluride (HgCdTe) electron Avalanche Photodiode (e-APD) Sensor Chip Assemblies (SCA) for the NASA GSFC Airborne CO2 and Methane Lidar. These sensor chips will be used as spares for the Lidar and must be fully compatible with the existing cry-coolers housing and support electronics. Interested organizations may submit their capabilities and qualifications by April 12, 2016.