Tuesday, October 06, 2015 Santos Rodriguez NWS EMWIN HRIT/EMWIN

Outline EMWIN Brief Description LRIT Brief Description Satellite Transitions and Effects Aerospace EMWIN/HRIT Prototype

What is EMWIN? The Emergency Managers Weather Information Network 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, VHF Radio, and Internet dissemination of: –Alerts/Watches/Warnings < 1 minute –Forecasts –Graphics, Imagery

How EMWIN Works Data is collected from the NWS Gateway, Weather Wire and the InternetData is collected from the NWS Gateway, Weather Wire and the Internet Assembled and prioritizedAssembled and prioritized Sent to NESDIS, (Wallops CDA) where it is up- linked to GOES 11 and GOES 12Sent to NESDIS, (Wallops CDA) where it is up- linked to GOES 11 and GOES 12 Sent further west via “Peace Sat” (NOAA donated GOES-7) in a cooperative effort between NWS Pacific Region and the Univ. of HawaiiSent further west via “Peace Sat” (NOAA donated GOES-7) in a cooperative effort between NWS Pacific Region and the Univ. of Hawaii Transmitted via VHF radio (local re-broadcast) in some areasTransmitted via VHF radio (local re-broadcast) in some areas Sent on the Internet via IP unicastSent on the Internet via IP unicast

EMWIN User Receive System “Screen Shots”

Learn More For more information on EMWIN, future developments or possible vendor opportunities please check with the EMWIN team or the EMWIN website at:

What is LRIT? The Low Rate Information Transmission Re-broadcast of Environmental Data through GOES East and GOES West GOES Imagery Environmental Products EMWIN Re-broadcast GOES Data Collection System (DCS ) Digital Format CGMS LRIT/HRIT Global Specification Relatively Lower Cost Alternative

How LRIT Works GVAR Imagery collected and processedGVAR Imagery collected and processed Imagery is combined with other data setsImagery is combined with other data sets Environmental productsEnvironmental products EMWINEMWIN GOES DCSGOES DCS Administrative MessagesAdministrative Messages Data is encapsulated into LRIT packetsData is encapsulated into LRIT packets Information is sent to Wallops Island CDA then up-linked to GOES 11 and GOES 12Information is sent to Wallops Island CDA then up-linked to GOES 11 and GOES 12

Learn More More information on LRIT: LRIT/HRIT Global Specification – s/document/pdf_cgms_03.pdfhttp:// s/document/pdf_cgms_03.pdf –Currently under major revision

Transition to GOES N-P EMWIN Power reduced and changes in frequency & modulation All legacy EMWIN receivers become obsolete Dedicated transponder Data rate doubles Forward error correction (FEC) LRIT Dedicated transponder

Transition to GOES R-S EMWIN and LRIT merge Service becomes HRIT/EMWIN Frequency changes EMWIN modulation changes Data rate increases to 400 kbps EMWIN and LRIT GOES N user receive systems become obsolete

Flexible Solution Required To minimize transition impact on users Keep user costs low Improvements to services

Proof of Concept Receiver GOES R Program, NESDIS and NWS coordinated effort Development performed for GOES-R Program by Aerospace Corporation S/W Defined Radio (SDR) solution chosen Development begun in early 2008 Satisfactory performance test at Wallops CDA, August 2009 S/W, documentation and performance data will be released in near future Will be available on GOES-R Web site

HRIT/EMWIN SDR Proof of Concept Transition Agile Solution One hardware/software configuration can receive all current and future EMWIN, LRIT and HRIT/EMWIN signals Could be used now Reduced user impact Low cost (components < $100) Generic hardware Small form factor/portability SDR receiver is upgradeable No future hardware changes (GOES I-S compatible)

HRIT/EMWIN SDR LNB S/W Receiver & Display S/W 1 meter dish USB Aerospace IF Digitizer (AID) PC IF

HRIT/EMWIN AID FPGA USB ADC Filter AGC Total Cost < $100 RF Input Data Out

Conclusion HRIT/EMWIN proof of concept receiver will be demonstrated at poster session using GOES 14 live data Check for documentation and S/W release at: