Larry D. TravisLarry Travis is presently Associate Chief of the NASA Goddard Institute for Space Studies. He gained his PhD in Astronomy at Pennsylvania State University in 1971. He has acted as Principal Investigator or Co-Investigator on several NASA projects, an was awarded a NASA Exceptional Scientific Achievement Medal. His research interests include theoretical interpretation of remote sensing measurements of polarization, planetary atmospheres, atmospheric dynamics, and radiative transfer. Read More Read Less