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CBS/OPAG-IOS Workshop on Radar Data Exchange Exeter, UK, 24-26 April 2013

3.3 Summary of regional reports on the exchange of weather radar data, highlighting progress, plans and challenges. CBS/OPAG-IOS Workshop on Radar Data Exchange Exeter, UK, 24-26 April 2013. Daniel Michelson, SMHI, Sweden. Guidance: INF3.1. Data exchange practices WHAT?

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CBS/OPAG-IOS Workshop on Radar Data Exchange Exeter, UK, 24-26 April 2013

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  1. 3.3 Summary of regional reports on the exchange of weather radar data, highlighting progress, plans and challenges CBS/OPAG-IOS Workshop on Radar Data Exchange Exeter, UK, 24-26 April 2013 Daniel Michelson, SMHI, Sweden

  2. Guidance: INF3.1 Data exchange practices WHAT? Polar data and/or products More radar than other non-Res 40 obs data? Growth trend (more data being exchanged)? WHERE? Between/among which countries? HOW (technical)? File format(s) Exchange mechanisms, e.g. FTP, GTS, other WMO

  3. Guidance: INF3.1 Data exchange practices HOW (political)? Bilateral / multilateral agreement? Wider political framework? Capacity building within the region? Does Resolution 25 help? WMO What is the nature of existing data exchange? How prepared are we for global data exchange?

  4. Template summary table Countries denoted by top-level domain.

  5. RA I – Africa

  6. RA II – Asia

  7. RA III – South America • Brazil • Many radars and many owners/operators, some of which are commercial. • Most data available in TITAN format. Some in UF, PNG, BUFR, netCDF, industrial. • Argentina: several radars, some providing data in TITAN format, others using proprietary industrial formats (EDGE, MURAN, IRIS, Rainbow) • Elsewhere: industrial formats • Big challenges to coordinate domestic data flow. • International exchange? (Data from BR and PY)

  8. RA IV – North and Central America, Caribbean

  9. RA V – South-West Pacific

  10. RA VI – Europe

  11. RA VI – Europe (continued) Both BALTRAD and OPERA incorporate centralized QC in their data processing chains.

  12. OPERA exchange matrixVersion: 3 January 2013Updated regularly

  13. Existing exchange between regions? Yes: • NCEP Stage IV surface rain composites from NEXRAD in GRIB format (RA IV) used by ECMWF (RA VI) • EC Caribbean (RA IV) radar project includes GF (RA III) Potentially yes: • RA II and V: pursuing framework under the umbrella of ASEAN

  14. Important issues to be discussed • Network load balancing between site and center (domestic data transmission) ray-by-ray. • Standard file format required for managing polarimetric data. Vital that the standard is adhered to. • Data/products should be defined by levels (I-III) for exchange. • WMO experts should define harmonized QC methods which are then applied by members (RQQI?).

  15. Summary – progress • National and regional weather radar networks have developed relatively recently; coverage over land becoming more complete, but still large gaps. • Polarimetric radar technology is being phased into operational networks globally. • Holistic QC chains are emerging in some places, but are still in their infancy. • Harmonized data representation proven possible in a large heterogeneous network (ODIM).

  16. Summary – plans • National networks to continue to develop and improve. • Regional networks to evolve. • Increased data availability should help clarify/refine user requirements, e.g. NWP, hydrology, etc.

  17. Summary – challenges • Surface-based scanning weather radar will always have irregular spatial coverage. • Unlike e.g. satellite data, radar data are much more heterogeneous due to different drivers, manufacturers, operators, configurations, data representations, etc. • Political issues: data availability, agreement on e.g. data exchange model, commerical. • Access to sufficient network bandwidthsupporting exchange.

  18. Thank you for your attention • Daniel Michelson • Swedish Meteorological and Hydrological Institute • Norrköping, Sweden • daniel.michelson@smhi.se

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