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Saturday, June 7, 2014 Santos Rodriguez NWS EMWIN

HRIT/EMWIN. Saturday, June 7, 2014 Santos Rodriguez NWS EMWIN . Outline. EMWIN Brief Description LRIT Brief Description Satellite Transitions and Effects Aerospace EMWIN/HRIT Prototype. What is EMWIN?.

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Saturday, June 7, 2014 Santos Rodriguez NWS EMWIN

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  1. HRIT/EMWIN Saturday, June 7, 2014 Santos Rodriguez NWS EMWIN

  2. Outline • EMWIN Brief Description • LRIT Brief Description • Satellite Transitions and Effects • Aerospace EMWIN/HRIT Prototype

  3. What is EMWIN? • The Emergency Managers Weather Information Network is a low cost, priority-driven weather data broadcast service that provides one of the most robust NWS systems for public weather dissemination • EMWIN provides rapid Satellite, VHF Radio, and Internet dissemination of: • Alerts/Watches/Warnings < 1 minute • Forecasts • Graphics, Imagery

  4. How EMWIN Works • Data is collected from the NWS Gateway, Weather Wire and the Internet • Assembled and prioritized • Sent to NESDIS, (Wallops CDA) where it is up-linked to GOES 11 and GOES 12 • Sent further west via “Peace Sat” (NOAA donated GOES-7) in a cooperative effort between NWS Pacific Region and the Univ. of Hawaii • Transmitted via VHF radio (local re-broadcast) in some areas • Sent on the Internet via IP unicast

  5. EMWIN User Receive System“Screen Shots”

  6. Learn More • For more information on EMWIN, future developments or possible vendor opportunities please check with the EMWIN team or the EMWIN website at: http://www.weather.gov/emwin/index.htm

  7. What is LRIT? • The Low Rate Information Transmission • Re-broadcast of Environmental Data through GOES East and GOES West • GOES Imagery • Environmental Products • EMWIN Re-broadcast • GOES Data Collection System (DCS) • Digital Format • CGMS LRIT/HRIT Global Specification • Relatively Lower Cost Alternative

  8. How LRIT Works • GVAR Imagery collected and processed • Imagery is combined with other data sets • Environmental products • EMWIN • GOES DCS • Administrative Messages • Data is encapsulated into LRIT packets • Information is sent to Wallops Island CDA then up-linked to GOES 11 and GOES 12

  9. Learn More • More information on LRIT: • LRIT/HRIT Global Specification • http://www.eumetsat.int/groups/cps/documents/document/pdf_cgms_03.pdf • http://www.noaasis.noaa.gov/LRIT • Currently under major revision

  10. Transition to GOES N-P • EMWIN • Power reduced and changes in frequency & modulation • All legacy EMWIN receivers become obsolete • Dedicated transponder • Data rate doubles • Forward error correction (FEC) • LRIT • Dedicated transponder

  11. Transition to GOES R-S • EMWIN and LRIT merge • Service becomes HRIT/EMWIN • Frequency changes • EMWIN modulation changes • Data rate increases to 400 kbps • EMWIN and LRIT GOES N user receive systems become obsolete

  12. Flexible Solution Required • To minimize transition impact on users • Keep user costs low • Improvements to services

  13. Proof of Concept Receiver • GOES R Program, NESDIS and NWS coordinated effort • Development performed for GOES-R Program by Aerospace Corporation • S/W Defined Radio (SDR) solution chosen • Development begun in early 2008 • Satisfactory performance test at Wallops CDA, August 2009 • S/W, documentation and performance data will be released in near future • Will be available on GOES-R Web site

  14. HRIT/EMWIN SDR Proof of Concept • Transition Agile Solution • One hardware/software configuration can receive all current and future EMWIN, LRIT and HRIT/EMWIN signals • Could be used now • Reduced user impact • Low cost (components < $100) • Generic hardware • Small form factor/portability • SDR receiver is upgradeable • No future hardware changes (GOES I-S compatible)

  15. HRIT/EMWIN SDR 1 meter dish Aerospace IF Digitizer (AID) PC LNB S/W Receiver & Display S/W IF USB

  16. HRIT/EMWIN AID RF Input Filter AGC FPGA ADC USB Data Out Total Cost < $100

  17. Conclusion • HRIT/EMWIN proof of concept receiver will be demonstrated at poster session using GOES 14 live data • Check for documentation and S/W release at: • http://www.goes-r.gov/

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