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Recent intersatellite radiometric comparisons of the Tropical Rainfall Measurement Mission Microwave Imager (TMI) with polar orbiting satellite radiometer data and modeled clear-sky radiances have uncovered a time-variable radiometric bias in the TMI brightness temperatures. The bias is consistent with a source that generally cools during orbit night and warms during sunlight exposure. The likely...
This work investigates the design of an innovative conical scanning Ku-band (13.4 GHz) scatterometer/radiometer for measuring ocean vector winds. The sensor design is based upon actual measurements obtained by the SeaWinds scatterometer and the Advanced Microwave Scanning Radiometer (AMSR), which operated simultaneously on JAXA's Advanced Earth Observing Satellite-II (ADEOS-II) during 2003. This new...
There is a strong national interest in the observation of ocean surface winds with high spatial and temporal resolution for understanding tropical cyclones and their effects on weather and climate and in forecasting storms making landfall. Current satellite and aircraft based remote sensing capability is limited in wind speed dynamic range and in the ability to retrieve wind information in the presence...
The Hurricane Imaging Radiometer, HIRAD, is a microwave remote sensor for improved airborne surveillance of ocean surface winds and rain in hurricanes. HIRAD uses a 1-D synthetic aperture thinned array to image the ocean at four frequencies between 4-7 GHz. This paper presents a brief description of the HIRAD array antenna and an analysis of some of the methods used in computing reconstructed brightness...
The SeaWinds sensor was launched onboard two satellite missions. The first was the QuikSCAT mission launched in mid 1999 by NASA, and the second was the ADEOS II mission launched by JAXA in late 2002. SeaWinds operates at a ku-band frequency of 13.4 GHz, and was originally designed to measure the speed and direction of the ocean surface wind vector by relating the normalized radar backscatter measurements...
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