IMAQS of UH (server2-aqm)
UH Real-Time Trajectory Analysis System (RTAS)
Objective Analysis |
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| To construct the real-time 3D wind field as input for backward trajectory, an objective analysis tool set has been developed for the UH RTAS. Several preprocessing modules of the Fifth Generation Mesoscale Model (MM5) have been incorporated in the objective analysis tool set. (Flow-chart of objective analysis) |
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| Two different domains are used for constructing the objectively analyzed 3-D wind field in the system. The larger domain has 12 km resolution and the smaller domain has 4 km resolution (domain configuration). In the current RTAS, the NCEP EDAS data is used in the REGRID module as background meteorological fields. Various real-time observation data including surface and upper air data are used in the LITTLE_R module, the objective analysis tools, to build the real-time 3-D wind field needed for the trajectory model. |
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Data Collecting System (DataSpider) --- |
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The nature of air quality research and service requires the analysis and observation data from external sources to be archived at regular time interval. The "DataSpider" is a batch data downloading system which was developed to help users automatically obtain and store text or image data available on the Internet. Two protocols, FTP and HTTP (including Post and Get methods) and simple URLs are currently supported in the "DataSpider". (Structure of DataSpider) |
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Real-time Meteorological Data --- |
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We have investigated the quality and availability of the existing real-time meteorological datasets and selected some of them that satisfy the data requirements for constructing wind fields. The following table shows meteorological datasets chosen for the UH RTAS. (observaton station map) |
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