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The Whistler Radar - KNMI:惠斯勒雷达KNMI
Radar Quality Control and Quantitative Precipitation Estimation Intercomparison ProjectStatus Paul Joe Environment Canada Commission of Instruments, Methods and Observations (CIMO) Upper Air and Remote Sensing Technologies (UARST) Outline Project Concept The Problem Overview of Data Quality Techniques Pre-RQQI Results Status External Factors Segmenting the DQ Adjustment Algorithms Segmenting the DQ Process for Quantitative Precipitation Estimation NowcastingClear Air Echo as Information Radar DQ is not just about QPE Nowcasting Non-precipitating echoes/insects Data Classification Radar Data for NWP Reflectivity, radial velocity assimilation VAD Winds Segmenting the DQ Process Some Examples Every radar has clutter due to environment! Sea Clutter and Ducting Electromagnetic Interference Techniques CAPPI is a classic technique to overcome ground clutter There are a variety of Scan Strategies(CAPPI Profiles) The elevation angles but nature of weather important for CAPPI Doppler Zero Velocity Notch Doppler Filtering Removal of Anomalous Propagation The Metric of Success Iso-range “Variance” as an intercomparison Metric Variance Metric Proposed Metric Alternate MetricsAccumulation of Radial Velocity should produce the mean wind for the site. Modality Need a variety of techniques Need a variety of scan strategies Need a variety of data sets that integrate to a uniform pattern Need weather with a variety of artifacts Pilot Study Purpose is to test the assumptions of the project modality Short data sets for uniformity Check the interpretation of the metric Variety of scan strategies, algorithms, etc Evaluate feasibility Uniform Fields Sample Cases Uniform with local clutter (XLA) Uniform with partial blocking (WVY) Urban Clutter/Niagara Escarpment (WKR) Strong Anomalous Propagation Echo (TJ 2006) Strong AP with Weather (TJ 2007) Sea Clutter (Sydney AU, Kurnell) Sea Clutter / Multi-path AP (Saudi 2002) Convective Weather with Airplane Tracks - One season (TJ Radar
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