emergency managers weather information network (emwin)

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Emergency Managers Weather Information Network (EMWIN)

Low Rate Information Transmission (LRIT)

Rob Wagner NOAA National Weather ServiceSantos Rodriguez NOAA National Weather Service

Paul Seymour NOAA Satellite and Information Service

NOAA Direct Readout Conference April 5th, 2011

High Rate Information Transmission (HRIT)

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Low Rate Information Transmission

LRIT is a collection of low resolution NOAA data and products,

packaged into a single stream, and rebroadcast over NOAA

geostationary satellites.

Users can obtain this information with relatively low cost ground systems.

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Low Rate Information Transmission

• L-Band LRIT Specifications

• GOES-11/12/13/14/15

– Frequency: 1691.0 MHz– Data Rate: 128 kbps – Modulation: BPSK– Polarization: Linear– LRIT on GOES-11 off during eclipse

• Eclipse outages in spring and fall

– No LRIT broadcast on GOES-12

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Low Rate Information Transmission

• Products– All GOES-East Visible/Infrared/Water Vapor imagery

plus GOES-West IR

– All GOES-West Visible/Infrared/Water Vapor imagery plus GOES-East IR

– Graphic images of MSG and MTSAT

– Tropical storm information

– Copy of EMWIN broadcast

– GOES Data Collection System broadcast

– Administrative messages

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Low Rate Information Transmission

• Improvements– MTSAT LRIT coming soon

– New products for both broadcasts

• Redundant LRIT at the OSPO COOP Site– Operational test this summer after EMWIN connection

is completed

• Transition from GOES-11 to GOES-N/O/P– Will not affect LRIT broadcast except for actual

switch-over

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What is EMWIN?• The Emergency Managers Weather Information

Network (EMWIN) 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, internet and VHF radio broadcasts of:– Alerts/Watches/Warnings < 1 minute– Forecasts– Graphics, Imagery

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EMWIN Assets• Large footprint

– EMWIN broadcast covers over 2/3rd’s of the earth’s surface– Used internationally in the Pacific rim, Caribbean and parts of

South America

• ReliableReliable – Transponders on GOES East and West for redundancyTransponders on GOES East and West for redundancy– Requires little infrastructure in a disaster, not dependent on Requires little infrastructure in a disaster, not dependent on

internet or utility linesinternet or utility lines– 24/7 since 1996 with almost zero down time 24/7 since 1996 with almost zero down time – L-band signal adds to reliabilityL-band signal adds to reliability

• Inexpensive equipment and softwareInexpensive equipment and software– No subscription satellite service. No subscription satellite service. – Free software defined radio receiver applicationFree software defined radio receiver application– Small form factor equipment, can even be used mobile Small form factor equipment, can even be used mobile

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EMWIN- How it WorksEMWIN- How it Works

• Data is collected from the NWS Gateway, NOAA Data is collected from the NWS Gateway, NOAA Weather Wire and the InternetWeather Wire and the Internet

• Assembled and prioritizedAssembled and prioritized• Sent to NESDIS, (Wallops CDA) where it is up-linked to Sent to NESDIS, (Wallops CDA) where it is up-linked to

the GOES satellitesthe GOES satellites• Sent further east via GOES 12Sent further east via GOES 12• Sent further west via “Peace Sat” (NOAA donated Sent further west via “Peace Sat” (NOAA donated

GOES-7) in a cooperative effort between NWS Pacific GOES-7) in a cooperative effort between NWS Pacific Region and the Univ. of HawaiiRegion and the Univ. of Hawaii

• Sent on the internet via ip unicastSent on the internet via ip unicast• Transmitted via VHF radio (local re-broadcast) in some Transmitted via VHF radio (local re-broadcast) in some

areasareas

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EMWIN User Receive System“Screen Shots”

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EMWIN GOES-N Satellites

• GOES N thru P changes– Data rate doubles from legacy EMWIN– Forward error correction– Offset QPSK modulation– Allows enhancement of the data stream– Coding gains used to retain current user dish sizeCoding gains used to retain current user dish size– Dedicated transponder– No eclipse outage

• GOES East was replaced April 2010 • GOES West likely replaced December 2011

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HRIT/EMWIN• GOES-R constellation

– Combined HRIT/EMWIN transponder• Greater user/vendor base• Combined LRIT and EMWIN Broadcast/Product Suite

– HRIT/EMWIN Specifications• Frequency: 1697.4 MHzData Rate: 400 kps • Modulation: BPSK Polarization: Linear• Forward error correction

– User satellite dish form factor remains small– HRIT / EMWIN Prototype Receiver

• Capable of receiving HRIT/EMWIN, LRIT and EMWIN from all GOES-Series

• Information available at www.goes-r.gov

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HRIT/EMWIN Prototype Receiver Demonstration

Tonight 5:30

Ballroom #4

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Contact Information

• Paul Seymour– Paul.Seymour@NOAA.Gov– 301-817-4521– www.noaasis.noaa.gov

• Rob Wagner– Robert.Wagner@NOAA.Gov– 301-713-0870 x 154 – http://www.weather.gov/emwin/

• Santos Rodriguez – Santos.Rodriguez@NOAA.Gov– 301-713-0077 – http://www.weather.gov/emwin/

– HRIT/EMWIN Information: www.goes-r.gov

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Backup Slides

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BackgroundUser Transition Costs EMWIN-N

• EMWIN-II user transition cost breakdown– Users with frequency stable legacy LNB system

requiring only I/F adapter and receiver cost are approx. $800

– Users with legacy LNA system requiring only I/F adapter and receiver cost are approx. $1000

– Complete new system including PC costs approx. $2400

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EMWIN Footprint

EMWIN coverage map at 1 deg. elevation for GOES Satellites

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EMWIN-N and HRIT/EMWIN Interfaces