Wu-Yang Tsai

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snow classification system at different times of the snow season. We show the evolution of the backscatter signature throughout the entire seasonal snow cycle. Within the snow extent determined by the National Oceanic and Atmospheric Administration (NOAA), Washington, DC, and Climate Prediction Center (CPC), operational snow product, u-band backscatter data(More)
— Scatterometer instruments are active microwave sensors that transmit a series of microwave pulses and measure the returned echo power to determine the normalized radar backscattering cross section (sigma-0) of the ocean surface from which the speed and direction of near-surface ocean winds are derived. The NASA Scatterometer (NSCAT) was launched on board(More)
—The QuikSCAT radar measurements of several tropical cyclones in 1999 have been studied to develop the geophysical model function (GMF) of Ku-band radar 0 s for extreme high wind conditions. To account for the effects of precipitation, we analyze the co-located rain rates from the Special Sensor Mi-crowave/Imager (SSM/I) and propose the rain rate as a(More)
—Conically scanning pencil-beam scatterometer systems, such as the recently launched SeaWinds radar, constitute an important class of instruments for spaceborne climate observation. In addition to ocean winds, scatterometer data are being applied to a wide range of land and cryospheric applications. A key issue for future scatterometer missions is improved(More)
SeaWinds-1 B is an spaceborne instrument, under design at the Jet Propulsion J.-aboriitory, to accurately measure the speed and direction of ocean surface winds at high resolutions. SeaWinds-l B consists of a scatterometer and a polarimetric wind radiometer. The scatterometer employs range compression to increase the resolution of its sigma-O measurements.(More)
Several spaceborne scatterometer missions have been successfully flown in the past decade. In addition to the primary mission of measuring ocean surface wind speed and direction, these measurements have proven useful in global scale climate studies of land and ice phenomena as well. A key shortcoming of the scatterometer in these measurements has been the(More)
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