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April 13, 2010 NWS EMWIN TEAM

EMWIN OVERVIEW. April 13, 2010 NWS EMWIN TEAM. What is EMWIN?. The Emergency Managers Weather Information Network is a priority-driven computer weather data broadcast system that takes advantage of minimal bandwidth.

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April 13, 2010 NWS EMWIN TEAM

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  1. EMWIN OVERVIEW April 13, 2010 NWS EMWIN TEAM

  2. What is EMWIN? • The Emergency Managers Weather Information Network is a priority-driven computer weather data broadcast system that takes advantage of minimal bandwidth. • EMWIN provides rapid Satellite, VHF Radio, and Internet dissemination of: • Alerts / Watches/Warnings < 1 minute • Forecasts • Graphics, Imagery • No other NWS dissemination system: • Has comparable level of redundancy • As large satellite footprint • Requires so little infrastructure in a disaster • Makes use of “weather proof ” L-Band

  3. How it works • Data is collected from the Gateway, Weather Wire and the Internet • Assembled into a prioritized data stream • Sent to NESDIS, (Wallops CDA) where it is up-linked to GOES 11 and GOES 12 • Sent further west via PeaceSat in a cooperative effort between NWS Pacific Region and the Univ. Hawaii • Transmitted via VHF radio (local re-broadcast) in some areas • Sent on the Internet via IP unicast (AKA “ByteBlaster”)

  4. EMWIN Dataflow GOES SPACE CRAFT NOAANET NWS GATEWAY SYSTEM NOAANET Circuit Primary Secondary circuit EMWIN Servers WALLOPS CDA Silver Spring WWIRE System Wallops Tertiary WWIRE System EMWIN satellite User INTERNET CLOUD Internet Push

  5. Typical EMWIN Satellite User EMWIN SATELLITE Dish Internet cloud Optional Alarm Controller Receiver Internet access to Byte blaster network To Alarm Units Standard Pentium PC

  6. EMWIN Footprint EMWIN coverage map at 1 deg. elevation for GOES Satellites

  7. EMWIN Satellite Constellation GOES-13 NDrifting to 75W GOES-11 (West)135 W Telstar 5 KU Band97 W PSAT175 W GOES-14 (N) Test Platform 105 W GOES-12 (East)75 W

  8. EMWIN Broadcasts

  9. EMWIN Users • Local and National Emergency managers • International Met Services • Storm Spotters, Schools, meteorologists • TV Stations • Emergency Responders • Re-broadcasters using VHF • Paging networks • Worldwide Internet users via ByteBlaster network • Weather Channel is known to use EMWIN

  10. EMWIN User Receive System“Screen Shots”

  11. EMWIN International Users • Pacific Rim Nations • “Peace Sat” relays the EMWIN data stream from Univ. of Hawaii • Provides advance warnings eg. Tsunamis and Typhoons • Testimonials show that after a severe event the only weather system still functioning was EMWIN • Canada • Canadian Meteorological Service uses for warnings • Caribbean, Central & South American Nations • As of 2007 many Caribbean island nations implemented EMWIN systems for Emergency Management • In Latin America used for hurricane preparedness and flooding, volcanic ash etc.

  12. EMWIN VHF Re-transmission • The EMWIN signal is also re-transmitted line-of-sight using government VHF frequencies to local communities • Re-broadcasters can filter the national data stream and re-insert local emergency data or relay it in its’ entirety • Some areas use EMWIN in Police cars • Largest rebroadcast network is Florida’s network (FWIN) used statewide by Emergency Managers.

  13. EMWIN Assets • The EMWIN I signal covers over 3/4’s of the earth’s surface • Transponders on GOES East and West for redundancy • The user equipment is inexpensive, non-proprietary, compact, rugged and requires little infrastructure • Reliable, 24/7 for over 11 years with almost zero down time • L-band signal is “Weather Proof” • Data is free, repeatable and customizable for local transmission. • Multiple inexpensive software display packages are available. • A publicly maintained user list for user support and monitoring • Text to voice messaging available thru paging networks that allows warning messages to be sent to cell phones, phones and PDA’s anywhere in CONUS, Pacific, or Caribbean

  14. EMWIN I Highlights • Conferences and Workshops • AMS Conferences • National Hurricane Conference • Pacific Region Hurricane Conference • Eastern and Southern Region Emergency Managers Conferences • Two Caribbean EMWIN-I training courses given in 2007 • NWS International Activities sponsored White House Third Border Initiative • Participated in UN SPIDER Conference at Barbados 2008 • NWS OCIO taught classes for Caribbean Emergency Managers at Silver Spring and the National Hurricane Center • Systems donated to nations attending, with ongoing support

  15. EMWIN-N • GOES N thru P constellation changes • All EMWIN-I receivers become obsolete • Power reduction • Dedicated transponder • Frequency shifts • Modulation scheme changes • EMWIN Transition plan is posted on : • http://www.weather.gov/emwin/index.htm

  16. Transition Details • On or about April 26,2010, GOES-13 replaces GOES-12 and begins transmitting the EMWIN-N signal • GOES-12 will be turned off and begin to drift East towards 60 degrees West Long. @ .50 degrees per day drift rate • On May 5,2010, GOES -12 will be turned back on , transmitting the legacy EMWIN bitstream and will remain transmitting the legacy bitstream @ 60 degrees ,unless there is a failure. This allows for more transition time for GOES-East Users. • In December of 2011 GOES-14 will replace GOES-11 and will begin transmitting the EMWIN-N signal

  17. Transition Recommendations • Users should find out if they can point to GOES-West and still get a usable signal. If so, re-point. Then re-point to GOES-13 after purchase of GOES-N system. • Users that cannot purchase receivers and cannot receive GOES-14 , point to GOES-12 during drift or after it reaches 60 degrees. • If all fails, use the byteblaster internet broadcast until a receiver can be purchased. • Based on test results we have found that complete systems perform better that partial upgrades.Especially true for LNB front end systems.

  18. EMWIN N Highlights • Speed doubles • Forward error correction • Allows enhancement of the data stream • Coding gains used to retain current user dish size • NESDIS funded state-of-the-art software defined radio receiver backwards-compatible with EMWIN-I • Zephyrus is developing another type of EMWIN N receiver and is close to having a prototype receiver. • COTS User (Werner Labs) backwards compatible receive system developed and tested using S/W receiver • GOES-14 dedicated as test platform for developers until GOES-13 becomes operational

  19. EMWIN R • GOES R constellation • Combined EMWIN/LRIT transponder • Greater user/vendor base • Frequency, modulation, and Power change • Speed increases to 128KBS • Forward error correction • Backwards compatible software defined receiver prototype • Open source code software defined receiver

  20. EMWIN R Highlights • GOES-R Prototype is now tested and completed • Interface documents are formalized for ground and space segments • No manufactures as of now , however there are at least two developers looking at design

  21. In Conclusion • Questions?

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