Validation of MISR aerosol geophysical product with AERONET ground-based optical depth and sky radiance measurements
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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The SeaWinds scatterometer on the QuikSCAT spacecraft has been operating since August 1999 to provide global mapping of ocean winds.
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The feasibility of spaceborne scatterometers for the measurements of tropical cyclone wind fields has been investigated with the data from the Sea Winds scatterometer on QuickSCAT.
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The feasibility of Quikscat for the measurements of tropical cyclone wind fields has been investigated with the data from seven hurricanes.
Both surface and internal mass redistribution causes geocenter variations. The global surface mass redistribution can be measured or modeled and is considered as the primary contributor to the geocenter variations on seasonal time scale.
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The multi-angle Imaging SpecroRadiometer (MISR) instrument is to be launched with the Earth Observing System EOS-AM1 spacecraft in 1998.
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Prior to the launch of TOPEX/ Poseidon in August 1992, NASA established its primary in situ verification site on the Harvest oil platform located in the Pacific Ocean off the coast of central California. Data from a suite of geodetic and oceanographic instruments attached to the platform have been combined to yield a precise record of absolute sea level simce the beginning of the mission. Critical to the computation of this geocentric sea level record is the precise determination of the platform geodetic height and the vertical velocity in the global terrestrial reference frame.We compare estimates of the platform height and vertical velocity from global positioning system (GPS) data alone and from a combination of GPS and satellite laser ranging (SLR) information. Current estimates suggest the platform is subsiding at a rate of about 8 mm per year. This height information is combined with in situ tide gauge measurements of sea level relative to a platform reference mark in order to produce a continuous record of the local geocentric sea height.