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Title: QuikSCAT Radiometer (QRad) rain rates for wind vector quality control
Authors: Kasparis, Takis 
Ahmad, Khalil A.
Jones, Wilma L.
Keywords: Microwaves;Radiometers;Quality control;Brightness temperature;Algorithms
Issue Date: 2005
Publisher: IEEE
Source: Proceedings of MTS/IEEE OCEANS, 2005, Volume 1, Pages 326 - 330
Abstract: The SeaWinds scatterometer onboard the QuikSCAT satellite measures the ocean normalized radar cross section to infer the surface wind vector. In addition, SeaWinds simultaneously measures the polarized microwave brightness temperature of the ocean/atmosphere, and this passive microwave measurement capability is known as the QuikSCAT Radiometer (QRad). QRad brightness temperatures are used to infer instantaneous rain rates over oceans using a statistical retrieval algorithm that has been developed using collocated QRad brightness temperatures with TRMM Microwave Imager (TMI) rain rate measurements. In this paper, QRad retrieved rain rate examples are presented and comparisons are made with independent near simultaneous rain observations including the TRMM 3B42RT data product. This near-real-time global precipitation data product combines all passive microwave with geostationary visible/infrared precipitation estimates in global 3-hour universal time windows. Results demonstrate that QRad rain measurements agree well with these independent microwave rain observations, which demonstrates the utility of using QRad rain retrievals as a "stand alone rain quality flag".
ISBN: 0-933957-34-3
DOI: 10.1109/OCEANS.2005.1639783
Type: Book Chapter
Appears in Collections:Κεφάλαια βιβλίων/Book chapters

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