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Terminal Doppler Weather Radar (1-minute SPG products) Mike Istok Radar Improvement Manager PowerPoint Presentation
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Terminal Doppler Weather Radar (1-minute SPG products) Mike Istok Radar Improvement Manager NWS Office of Science & Technology 4-5 August 2014 National Weather Service Partners Meeting Silver Spring, MD. Terminal Doppler Weather Radar (1-minute products).

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Terminal Doppler Weather Radar (1-minute SPG products) Mike Istok Radar Improvement Manager


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    1. Terminal Doppler Weather Radar (1-minute SPG products) Mike Istok Radar Improvement Manager NWS Office of Science & Technology 4-5 August 2014 National Weather Service Partners Meeting Silver Spring, MD 8/4/2014 NWS Partners Meeting

    2. Terminal Doppler Weather Radar (1-minute products) • NOAAport & RPCCDS distribution of VCP80 rapid scan update products • 1 minute surface elevation base products • 3 minute storm products and 3rd elevation base products • Increases since single site max throughput by 2.5X to around 42 kbps • TIN 12-13 notified of a test that started April 2012 with 11 radars • TIN 13-3 notified that 7 radars were added February 2013 • Impact of adding the remaining 27 TDWR sites • Increase peak throughput by 5% • Evaluating impacts on affected systems 8/4/2014 NWS Partners Meeting

    3. Radar Product Central Collection and Dissemination Service (RPCCDS) Status • RPCCDS product latency/loss during peak summer hours • Observed when throughput was >133K products/hr and >2.5 G bytes/hour • TOC migrated the RPCCDS to a faster virtual server, but still having problems • Products are now shed when internal backlog queues reach thresholds • Loss of products to RPCCDS users and NCDC Archive (up to 20%) • Product shedding is a temporary measure to prevent excessive latencies and will be eliminated as soon as the RPCCDS problem is resolved • TOC considering software rewrite – should know more later this month 8/4/2014 NWS Partners Meeting

    4. WFO’s providing TDWR SPG Products 8/4/2014 NWS Partners Meeting

    5. Current Level 3 ThroughputNetwork Total (156 WSR-88D and 45 TDWR SPG) 8/4/2014 NWS Partners Meeting

    6. 2013 Level 3 ThroughputNetwork Total (156 WSR-88D and 45 TDWR SPG) 8/4/2014 NWS Partners Meeting

    7. Current Level 3 ThroughputSingle Site NEXRAD Dual Pol and TDWR SPG 8/4/2014 NWS Partners Meeting

    8. 2013 Level 3 ThroughputSingle Site NEXRAD Dual Pol and TDWR SPG 8/4/2014 NWS Partners Meeting

    9. 8/4/2014 NWS Partners Meeting