1. 1 April 27, 2004 Santos Rodriguez, NWS EMWIN CURRENT EMWIN OVERVIEW

2. 2 What is EMWIN? The Emergency Managers Weather Information Network is a wireless, priority-driven computer weather data broadcast system that takes advantage of minimal wireless bandwidth. EMWIN provides rapid Satellite, VHF Radio, and Internet dissemination of: Alerts / Warnings < 1 minutes Forecasts ~ 2- 5 minutes Graphics ~ 10 – 15 minutes Imagery ~ 10 – 15 minutes Other (as time permits) In severe weather non-warning products may take longer

3. 3 How it works Data are collected from a variety of sources: Data are collected from a variety of sources: 1. Gateway 1. Gateway 2. Weather Wire 2. Weather Wire 3. FTP 3. FTP 4. Internet 4. Internet They are assembled at the EMWIN servers and : They are assembled at the EMWIN servers and : 1. Prioritized into high, mid, and low priority products 1. Prioritized into high, mid, and low priority products 2. Split into 1k packets 2. Split into 1k packets 3. Assembled into a 9.6kbs serial data stream 3. Assembled into a 9.6kbs serial data stream

4. 4 How it works cont. The data stream is then sent to Wallops Command and Data Acquisition Station (WCDAS), NESDIS where it is Up linked to satellite (GOES 12 and GOES 10)The data stream is then sent to Wallops Command and Data Acquisition Station (WCDAS), NESDIS where it is Up linked to satellite (GOES 12 and GOES 10) At Pacific Region HQ, it is received from GOES-10 and up linked to PSAT which relays the signal father westAt Pacific Region HQ, it is received from GOES-10 and up linked to PSAT which relays the signal father west EMWIN products can be retransmitted by other methods EMWIN products can be retransmitted by other methods Transmitted via radio frequency (local re-broadcast)Transmitted via radio frequency (local re-broadcast) Sent on the Internet (Byte Blaster)Sent on the Internet (Byte Blaster)

5. 5 NWS EMWIN Architecture INTERNET CLOUD NWS GATEWAY SYSTEM WEATHERWIRE SYSTEM A & C B & D BYTE BLASTER NETWORK WALLOPS CDAS GOES SPACE CRAFT DEDICATED ANALOG LINE EMWIN FEED SOURCES EMWIN PC NETWORK EMWIN INTERNET PUSH BITSTREAM DEDICATED ANALOG LINE/T1 backup

6. 6 GOES FOOTPRINT GOES 10 (WEST)GOES 12 (EAST)

7. 7 EMWIN Users National Weather Service Forecast Offices and Warning Coordination Meteorologists (WCMs) National Weather Service Forecast Offices and Warning Coordination Meteorologists (WCMs) WCMs use EMWIN as a tool to promote the NWS to the public and for training Skywarn members, storm spotters and Local and National Emergency managers WCMs use EMWIN as a tool to promote the NWS to the public and for training Skywarn members, storm spotters and Local and National Emergency managers Canadian Met Service, South and Central American countries, Caribbean nations, Pacific Island nations, the NWS Pacific region Canadian Met Service, South and Central American countries, Caribbean nations, Pacific Island nations, the NWS Pacific region Schools, amateur meteorologists, EMTs, hobbyists of all ages, storm spotters, storm chasers, Skywarn Network Schools, amateur meteorologists, EMTs, hobbyists of all ages, storm spotters, storm chasers, Skywarn Network

8. 8 Many TV Stations in the mid-west, especially tornado alleyMany TV Stations in the mid-west, especially tornado alley Police Stations, Fire Stations, Emergency Centers, Emergency response personnelPolice Stations, Fire Stations, Emergency Centers, Emergency response personnel Re-broadcasters, paging networksRe-broadcasters, paging networks Worldwide Internet Users via Byte Blaster networkWorldwide Internet Users via Byte Blaster network Weather Channel is known to use EMWINWeather Channel is known to use EMWIN U.S. Air force uses in remote areasU.S. Air force uses in remote areas EMWIN Users cont.

9. 9 EMWIN in the Pacific Currently PSAT rebroadcasts an EMWIN data stream Provides advance warning of Tsunami and Typhoons Weve received testimonials noting that after a severe event the only weather system still functioning is EMWIN Many island nations already use EMWIN to save lives and property

10. 10 EMWIN VHF Re-transmission The EMWIN signal is re-transmitted locally using NWS or National Guard 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 Texas counties use EMWIN in Police cars Floridas network (FWIN) uses heavy filtering and employs 1200 baud as its retran data rate, it is a very effective network used statewide by Emergency Managers.

11. 11 Internet or Intranet cloud Typical VHF Re-transmission System EMWIN SERVER VHF Transmitter Receiver Custom local EMWIN Data stream To Paging Network GOES EAST dishGOES WEST dish 153.950KHz 1690.725MHz

12. 12

13. 13 Typical Radio Re-broadcast User Standard Pentium PC Internet access to Byte blaster network Internet cloud 0-100 mi from transmitter line of sight EMWIN VHF Radio Receiver 153.950KHz VHF EMWIN Optional Alarm Controller To Alarm Units

14. 14 Typical EMWIN Satellite User Internet cloud Standard Pentium PC EMWIN SATELLITE Dish Receiver Internet access to Byte blaster network Optional Alarm Controller To Alarm Units

15. 15 Byte Blaster Server Internet cloud Standard Pentium PC EMWIN SATELLITE Dish Receiver Internet access to Byte blaster network Optional Alarm Controller To Alarm Units

16. 16 Why EMWIN works so well The equipment is inexpensive. The equipment is inexpensive. An entire turnkey system costs as little as $1k. An entire turnkey system costs as little as $1k. The System needs little to no infrastructure. The System needs little to no infrastructure. EMWIN runs on a laptop. EMWIN runs on a laptop. A Solar powered version exists. A Solar powered version exists. Signal is Weather Proof due to L-Band transmission. Signal is Weather Proof due to L-Band transmission. USER Equipment is relatively compact and is very rugged. USER Equipment is relatively compact and is very rugged. The Data-stream is free, repeatable and can be customized for local retransmission. The Data-stream is free, repeatable and can be customized for local retransmission. EMWIN is non-proprietary. EMWIN is non-proprietary. Multiple inexpensive software display packages are available. Multiple inexpensive software display packages are available. A large and knowledgeable user community to help monitor performance and answer user questions (EMWIN user list). A large and knowledgeable user community to help monitor performance and answer user questions (EMWIN user list).

17. 17 EMWIN Current Status Frequency on GOES - 1690.725 MHz Frequency on GOES - 1690.725 MHz Modulation – Dual Frequency Shift Keying (DFSK) Modulation – Dual Frequency Shift Keying (DFSK) Speed - 9.6 kbps Speed - 9.6 kbps Upcoming Changes: Upcoming Changes: 1. Power level of broadcast significantly reduced, therefore coding gains will be needed in order to keep current user 1. Power level of broadcast significantly reduced, therefore coding gains will be needed in order to keep current user dish size the same. 2. Frequency and Modulation will change. 2. Frequency and Modulation will change.