TROPICAL TROPOPAUSE LAYER (TTL) IS A TRANSITION LAYER BETWEEN 14.5 KM (140 HPA) AND 18.5 KM (70 HPA) WHICH HAS BOTH TROPOSPHERIC AND STRATOSPHERIC C
$433,362FY2014National Aeronautics and Space AdministrationNASA
University Of Washington, Seattle WA
University Of Washington, Seattle WA