Airborne Tropical TRopopause EXperiment (ATTREX)

Airborne Tropical TRopopause EXperiment (ATTREX) — A multi-year project to investigate the physical processes and chemical composition of the tropical tropopause layer and the role of stratospheric water vapor in Earth's energy budget and climate, ATTREX was based out of Armstrong Flight Research Center (AFRC), California 2011-2013 and Guam in 2014.  SPEC's contribution to the payload aboard the NASA Global Hawk included the FCDP and Hawkeye to investigate the microphysical properties of TTL cirrus.