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April 13, 2010

NWS EMWIN TEAM

EMWIN OVERVIEW

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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

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How it worksHow it works

• Data is collected from the Gateway, Weather Wire and Data is collected from the Gateway, Weather Wire and the Internetthe Internet

• Assembled into a prioritized data streamAssembled into a prioritized data stream• Sent to NESDIS, (Wallops CDA) where it is up-linked to Sent to NESDIS, (Wallops CDA) where it is up-linked to

GOES 11 and GOES 12GOES 11 and GOES 12• Sent further west via PeaceSat in a cooperative effort Sent further west via PeaceSat in a cooperative effort

between NWS Pacific Region and the Univ. Hawaiibetween NWS Pacific Region and the Univ. Hawaii• Transmitted via VHF radio (local re-broadcast) in some Transmitted via VHF radio (local re-broadcast) in some

areasareas• Sent on the Internet via IP unicast (AKA “ByteBlaster”)Sent on the Internet via IP unicast (AKA “ByteBlaster”)

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EMWIN Dataflow

INTERNET CLOUD

INTERNET CLOUD

GOES SPACE CRAFT

NOAANET Circuit Primary

Wallops Tertiary WWIRE System

Silver Spring WWIRE System

EMWIN Servers

NWS GATEWAY SYSTEM Secondary circuit

Internet Push

NOAANETNOAANET

EMWIN satellite User

WALLOPS CDA

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Typical EMWIN Satellite User

Internet cloud

Internet cloud

Standard Pentium PC

EMWIN SATELLITE Dish

Receiver

Internet access to Byte blaster network

Optional Alarm Controller

To Alarm Units

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EMWIN Footprint

EMWIN coverage map at 1 deg. elevation for GOES Satellites

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EMWIN Satellite Constellation

PSAT175 W

GOES-13 NDrifting to 75W

GOES-11 (West)135 W

Telstar 5 KU Band97 W

GOES-14 (N) Test Platform 105 W

GOES-12 (East)75 W

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EMWIN BroadcastsGOES 12 (East) L Band, 1690.725 MHz. DFSK 9.6 kbps

GOES 11 (West) L Band, 1690.725 MHz. DFSK 9.6 kbps

GOES 13 (N) Offline will be used to replace GOES 12 (East) April 26,2010

L Band, 1692.725 MHz. OQPSK 19.2 kbps

GOES 14 (O) For Testing/Development

L Band, 1692.725 MHz. OQPSK 19.2 kbps

GOES 7 (Peace Sat) L Band, 1690.725 MHz. DFSK 9.6 kbps

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EMWIN Users

• Local and National Emergency managersLocal and National Emergency managers• International Met ServicesInternational Met Services• Storm Spotters, Schools, meteorologistsStorm 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

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EMWIN User Receive System“Screen Shots”

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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.

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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.

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

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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

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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

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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

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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.

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EMWIN N Highlights• Speed doubles• Forward error correction• Allows enhancement of the data stream • Coding gains used to retain current user dish sizeCoding 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

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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

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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

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In Conclusion

• Questions?