Weather Radar Systems. General Description
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- Jane Warner
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1 General Description Our weather radars are designed for precipitation monitoring at both regional and urban scales. They can be advantageously used as gap filler of existing radar networks particularly in areas with complex topography. The radar can be installed alone or in a cluster, in both fixed and mobile configurations. Cluster networking allows the system coverage to be extended practically without limit. The resulting image products are mosaics integrating the data collected by all the sensors composing the network. Thanks to the use of the latest technology, the installation, and operating costs of WR-10X radars networks are very attractive alternatives to the traditional high-power big-size weather radar approach. The control and display software has a very intuitive graphic user interface, which allows good skills in radar operation and data interpretation to be achieved after only a short training period, even for a user without specific knowledge in radar meteorology. Once a scanning schedule has been programmed, the system will begin acquiring data and generating "products", which are images of the weather events detected, with color levels proportional to weather intensity, superimposed on a local map, with adjustable distance and time scales. A comprehensive set of the most common weather products is provided with the system, and thanks to the open software architecture, additional or customized products can be easily added later. Reliability, maintainability, and ease of installation were fundamental design objectives for the systems The systems can be remotely controlled, operated, and tested, so there is no need for easy access to the radar site. Two models are available: WR-10X and WR-10X-CE Page 1 of 5
2 WR-10X Technical description The WR-10X weather radar system operates in X band ( MHz), allowing the use of a very compact antenna while still preserving good angular resolution. The radar electronics are integrated into the antenna pedestal and everything, with the exception of the server PC, is contained inside a small radome. This integrated configuration allows the installation time and the cost of the infrastructure to be drastically reduced. The power consumption (approx. 200W) is tiny compared to a traditional high power weather radar. The coverage range is up to 72 km depending on precipitation rate. Any communication channel supporting the TCP/IP protocol can be used for the WR-10X networked radar sites and control center, including standard wireless or switched telephone networks. Despite its low cost, the WR-10X provides all the features necessary for accurate and complete radar observations and the assessment of weather phenomena: a "pencil-beam" antenna with equal beam widths in both elevation and azimuth, with full control of the antenna elevation to allow acquisition of three-dimensional sets (volumes) of polar data for generating meteorological products. The radar products listed below consist of maps representing various weather parameters such as reflectivity, instantaneous and accumulated surface rainfall, from a single radar or from a combination of networked sensors (mosaic). The radar software can be used to display both real-time and archived products with "movie-loop" functionality. Each radar can be individually programmed with a particular scanning schedule to acquire and record data in a synchronous way. The software allows integration of the radar data with other sensor information, such as rain gauge data, satellite images, etc., to create customizable multi-sensor views. Page 2 of 5
3 Typical applications Monitoring of hydrological basins not covered by the main radar network, critical weather events for Civil Protection purposes, local urban area weather conditions for local authorities and citizens, weather conditions for outdoor recreational activities, sports, concerts, happenings, etc., urban or regional weather for local TV stations, hydroelectric basin conditions, roads, airports, harbors, events potentially harmful for agriculture. Available Radar Products: SRI: Surface Rainfall Intensity (instantaneous) SRT Surface Rainfall Total (accumulated) CAPPI Constant Altitude PPI VMI Vertical Maximum Intensity ECHO VMI: Height of maximum reflectivity HVMI: Maximum Reflectivity on horizontal and vertical axis VCUT: Atmosphere vertical cross section VPR: Reflectivity vertical profile LBM: ECHO LBM: Low base map height of low base map Nowcasting: storm cell evolution forecast at: 15, 30, 1h Mosaic: combination of the maps of all the radars present in the same network Page 3 of 5
4 WR-10X Specifications Transceiver Operating frequency 9410 MHz ±30 MHz Peak power 10 KW (magnetron) Pulse width 0.6 µs (typical) Pulse Repetition frequency 800 Hz (+- 10%) Receiver Logarithmic Dynamic range >90 db Intermediate frequency 60 MHz IF bandwidth 4 MHz Noise figure < 4 db Antenna Horizontal polarization, pencil beam protected by radome Diameter 70 cm Horizontal lobe width <3 Vertical lobe width <3 Sidelobes within ±10 <-25 db Gain >35 db Signal processor Type Digital processing on PC Output Horizontal reflectivity (Z) in dbz with 256 levels (8 bit) Sensitivity km (standard) Statistical clutter correction. Visualization and Control Programmable movie loop PPI and RHI display for products and moments visualization. Realtime PPI and RHI display for moments visualization. Realtime A-Scope display for moments visualization. User friendly GUI for Radar programming and control. Dimensions and Weight: Dimension: Weight: Cylindrical radome with diameter of 1235 mm and height of 1430 mm < 150Kg excluding mast or trailer Movement Continuous azimuth scan with elevation steps of 0,5 in the 0 to 90 range. Optional RHI. Power Consumption Approx. 200 Watt without antenna heating. Page 4 of 5
5 WR-10X-CE The WR-10-CE is a low cost version of the WR-10X with only azimuth scanning capability. The elevation can be set to a fixed value manually. It uses the same transceiver and antenna type as the WR-10X. WR-10X-CE Specifications Transceiver Operating frequency 9410 MHz ±30 MHz Peak power 10 KW (magnetron) Number of range bins 240 Range/Resolution 72km/300m, 36km/150m; 21.6km/90m Receiver Logarithmic Dynamic range >90 db Intermediate frequency 60 MHz IF bandwidth 4 MHz Noise figure < 4 db Antenna Horizontal polarization, pencil beam protected by radome Diameter 70 cm Horizontal lobe width <3 Vertical lobe width <3 Sidelobes within ±10 <-25 db Gain > 35 db Signal processor Type Digital processing on PC Output Horizontal reflectivity (Z) in dbz with 256 levels (8 bit) Sensitivity km (standard) Statistical clutter correction. Visualization and Control Display Z versus Range and Azimut. Scheduler and radar supervision. User friendly GUI for Radar programming and control. Dimensions and Weight: Dimension: Cylindrical radome with diameter of 1235 mm and height of 1430 mm Weight: < 150Kg excluding mast or trailer Power Consumption Movement Approx. 200 Watt without antenna heating. Continuous azimuth scan at prefixed elevation Page 5 of 5 METEK GmbH, Fritz-Strassmann-Str. 4, Elmshorn, Germany Phone: , Fax: info@metek.de, Internet:
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