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April 27, 2004 Santos Rodriguez, NWS EMWIN

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

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April 27, 2004 Santos Rodriguez, NWS EMWIN

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

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

  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) • At 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 • Transmitted via radio frequency (local re-broadcast) • Sent on the Internet (Byte Blaster)

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

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

  7. EMWIN Users • National Weather Service Forecast Offices and Warning Coordination Meteorologists (WCM’s) • WCM’s 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 • Schools , amateur meteorologists, EMT’s, hobbyists of all ages, storm spotters, storm chasers, Skywarn Network

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

  9. EMWIN in the Pacific • Currently PSAT rebroadcasts an EMWIN data stream • Provides advance warning of Tsunami and Typhoons • We’ve 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. 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 • Florida’s 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. Typical VHF Re-transmission System 1690.725MHz 1690.725MHz GOES WEST dish GOES EAST dish Internet or Intranet cloud Receiver Custom local EMWIN Data stream 153.950KHz To Paging Network VHF Transmitter EMWIN SERVER

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

  13. 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

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

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

  16. EMWIN Current Status • Frequency on GOES - 1690.725 MHz • Modulation – Dual Frequency Shift Keying (DFSK) • Speed - 9.6 kbps • Upcoming Changes: • 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.

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