OPERA SOFTWARE
– Compositing software Within the first OPERA Programme, compositing software has been developed that is available to all OPERA members. BUFR table maintenance includes defining new descriptors, sequences, and tables for use with OPERA BUFR software, where relevant and applicable. The encoder includes a pre-processor preparing an ASCII file as input to the final processor which then writes the binary data file. – OPERA BUFR software encodes and decodes radar data in BUFR format. User support is provided to the OPERA group and other users of the OPERA BUFR software, including commercial radar software suppliers. The OPERA community has developed several software packages to enable exchange of radar data from different sources and manufacturers. – For national weather services not participating in OPERA which want to use the products to support their public weather service, contact For a research and education licence, contact For a licence to exploit the products commercially, contact one of the ECOMET members contact points or send a mail.
OPERA LICENSE
The OPERA products are also available under license to 3rd parties: The members of OPERA and EUMETNET may use the composites for their official duties without a separate licence. Each file has two fields: the data field and the quality field. In the maximum reflectivity composite each composite pixel contains the maximum of all polar cell values of the contributing radars at that location.Ĭomposites are available in two formats: BUFR and HDF5. Rainfall accumulation is simply the sum of the previous four 15-minute rain-rate products. Measured reflectivity values are converted to rainfall (mm/h) using the Marshall-Palmer equation. Polar cells within a search radius of 2.5 km of the composite pixel are considered. In the rain rate composite each composite pixel is a weighted average of the valid pixels of the contributing radars, weighted by a quality index, the distance from center of the pixel and an exponential index related to inverse of the beam altitude. They are updated every 15 minutes, and issued ca. The composites cover the whole of Europe in a Lambert Equal Area projection. Odyssey, the OPERA Data Centre, generates and archives composite products from raw single site radar data using common pre-processing and compositing algorithms. Pursuing a study programme addressing new technologies, quality information, current and developing algorithmsĭefining and promoting common data exchange formats ĭistributing information to stakeholders and gaining public visibility with the EUMETNET external websiteĬooperation with WMO in the context of WIGOS for global exchange of radar knowledge OPERA Datacentre Odyssey Maintaining a database of metadata of members‘ radars Using the data hub to make data available for members and 3rd parties Running a data hub and gradually replacing it with new production lines To inform the wider operational and research community of its activities.
To offer a forum for exchange of experience and for capacity building in the field of weather radars within EUMETNET To provide support to its members in environmental and societal issues related to weather radars, such as radar siting, radio-frequency interference and the impact of wind farms
To enhance expertise in the field of weather radar (hardware, software, products, quality, network design etc.) within EUMETNET and the whole weather radar community To develop the OPERA Data Information Model (ODIM)
31 March 2020.To operate and develop a data hub, which collects radar volume data, distributes quality flagged volume data to modelers and other radar data users, and produces quality controlled radar products To increase the lower end of your vocal range, think about relaxing your voice rather than moving towards vocal fry as an alternative to that deeper sound.Use a piano or keyboard and try to match the notes to find out. If you're a female with a low voice, or a male with a high voice, you may fall into these voice ranges.Countertenors often use a falsetto, or head voice, technique to reach their high notes.True contralto voices are so rare that contralto roles are often given to mezzo sopranos.
The only difference is that countertenors generally cannot hit the lowest F, so that range actually starts from the G below middle C and goes up an octave to F. Contralto is the lowest female voice range, and countertenor is the highest male range these ranges consist of almost the exact same notes. Sing the F below middle C to the F one octave above it for contralto and countertenor voices.
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