Completed in December 2014, the NASA Building 12 installation consists of four Urban Green Energy Eddy GT turbines. The NASA Building 12 project involved detailed pre-construction and post-construction measurements. NREL researchers initiated a measurement campaign consisting of multiple rooftop anemometers and other atmospheric instrumentation located on the prospective turbine pad mounts and in the immediate rooftop vicinity. The Building 12 measurement program consisted of two phases: Phase 1 is the pre-construction measurement campaign, and Phase 2 is the post-construction measurement campaign. The power data for Phase 2 were measured by the NASA enterprise Supervisory Control and Data Acquisition system and contain inputs directly from the turbine inverters. Phase 2 data collection is ongoing, as of December 2015.