نتایج جستجو برای: national aeronautics and space administration task load index
تعداد نتایج: 17035076 فیلتر نتایج به سال:
Scott W. Powell, Robert A. Houze, Jr. , Anil Kumar, and Sally A. McFarlane Department of Atmospheric Sciences, University of Washington, Seattle, Washington Hydrological Science Branch, NASA Goddard Space Flight Center, Greenbelt, Maryland Earth System Science Interdisciplinary Center, University of Maryland, College Park, Maryland Climate Physics Group, Pacific Northwest National Laboratory, R...
[1] We describe an updated model of the dust aerosol cycle embedded within the NASA Goddard Institute for Space Studies ‘ModelE’ atmospheric general circulation model (AGCM). The model dust distribution is compared to observations ranging from aerosol optical thickness and surface concentration to deposition and size distribution. The agreement with observations is improved compared to previous...
1 NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA 2 The University of Leicester, The Department of Physics and Astronomy, Leicester, LE1 7RH, UK 3 University of Kansas, Department of Physics and Astronomy, 1251 Wescoe Hall Dr., Lawrence, Kansas, 66045 4 University of Miami, Department of Physics, Coral Gables, Florida 33124, USA 5 LATMOS-IPSL/CNRS, 11 Boulevard d’Alembert, 7828...
The NASA-funded opticai communications program being conducted at JPL is described, The spacecraft transceiver terminal developments, a test infrastructure for assessing the performance of future space terminals, an atmospheric visibility monitoring program, some recent systems-level demonstrations, and a communications technology roadmap for planetary missions over the next 25 years are presen...
Classic examples of service disasters include Victoria’s Secrets and the NASA Pathfinder mission web casts, during which users could not access to the sites or experienced infinite delays. These were caused by the so-called Flash Crowds [8], which are large numbers of users trying to access the same web site simultaneously and thus demanding site resources exponentially. The issue further compl...
Modelling the direct effect of aerosols in the solar near-infrared on a planetary scale N. Hatzianastassiou, C. Matsoukas, A. Fotiadi, E. Drakakis, P. W. Stackhouse Jr., P. Koepke, K. G. Pavlakis, D. Hatzidimitriou, and I. Vardavas Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece Foundation for Research and Technology-Hellas, Heraklion, Crete, Gre...
A new estimate of tundra-biome phytomass from trans-Arctic field data and AVHRR NDVI Martha K. Raynolds a , Donald A. Walker a , Howard E. Epstein b , Jorge E. Pinzon c & Compton J. Tucker c a Institute of Arctic Biology, University of Alaska, Fairbanks, AK, 99775, USA b Department of Environmental Sciences, University of Virginia, Charlottesville, VA, 22904, USA c Biospheric Science Branch, NA...
OF SHERGOTTITES T. J. Lapen, M. Righter, A. D. Brandon, B. L. Beard, J. Shafer, A. J. Irving, Department of Geosciences, University of Houston, Houston TX 77204-5007 ([email protected]), NASA-Johnson Space Center, Mail Code KR, Houston TX 77058, Department of Geology and Geophysics, University of Wisconsin-Madison, Madison WI 53706, NASA Astrobiology Institute. Dept of Earth & Space Sciences, Univ...
Airborne lidar technology is attractive for hydrographic surveying because of its high rate of area coverage coupled with high spatial data density, rapid-response and reconnaissance capabilities, and cost effectiveness. The National Ocean Service (NOS) has been involved in the design, implementation, and testing of such systems in conjunction with NASA, the U.S. Navy, and the U.S. Army Corps o...
The European Space Agency and other space agencies such as NASA recognize that the question with regard to life beyond Earth in general, and the associated issue of the existence and study of exoplanets in particular, is of paramount importance for the 21(st) century. The new Cosmic Vision science plan, Cosmic Vision 2015-2025, which is built around four major themes, has as its first theme: "W...
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