Institution: | a Center for Earth and Planetary Studies, National Air and Space Museum MRC 315, Smithsonian Institution, Washington, DC 20013-7012, USA b Education Division, National Air and Space Museum MRC 305, Smithsonian Institution, Washington, DC 20013-7012, USA c Great Sand Dunes National Park and Preserve, 11500 Highway 150, Mosca, CO 81146-9798, USA d National Climatic Data Center, Federal Building, 151 Patton Ave., Asheville, NC 28801-5001, USA |