NOXX20 KWBC 131746

ADMEMW

 

NATIONAL ADMINISTRATIVE MESSAGE FOR EMWIN

NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC

1140 AM EST FRI FEB 13 2004

 

TO:       EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/

          USERS

 

FROM:     LARRY CURRAN

          CHIEF...TELECOMMUNICATION OPERATIONS CENTER

          NATIONAL WEATHER SERVICE /NWS/

 

                    AND

 

          ANGELO WADE

          ELECTRONICS ENGINEER...GROUND SYSTEMS DIVISION

          OFFICE OF SYSTEMS DEVELOPMENT

          NATIONAL ENVIRONMENTAL SATELLITE...DATA...AND

          INFORMATION SERVICE /NESDIS/

 

SUBJECT:  EMWIN TRANSITION UPDATE 2/13/04

 

THIS MESSAGE IS PART OF A SERIES OF TRANSITION UPDATE MESSAGES TO

INFORM EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/

USERS OF NEW INFORMATION REGARDING THE TRANSITION OF THE EMWIN

DATASTREAM.  TRANSITION UPDATE INFORMATION IS POSTED ON THE EMWIN

INDEX PAGE AT /USE LOWER CASE/:

 

     INDEXLIST.HTML

 

THE EMWIN WEB SITE HAS BEEN REVISED AND UPDATED TO NOW INCLUDE

THE EMWIN TRANSITION PLAN.  THE EMWIN TRANSITION PLAN CONTAINS

THE REASONS FOR CHANGES RELATED TO THE NEW GENERATION OF GOES

SATELLITES... AN OVERVIEW OF HOW THE TRANSITION WILL BE MANAGED

AND A DESCRIPTION OF A PROTOTYPE RECEIVER DEVELOPED BY NESDIS

CAPABLE OF RECEIVING THE NEW DATA STREAM.  THE TRANSITION PLAN

ALLOWS FOR A TRANSITION PERIOD FOR THE COMPLETION OF TESTING AND

ENCOURAGING VENDORS TO DESIGN AND MARKET NEW RECEIVERS OR

CONVERSION KITS.  FUTURE UPDATES TO THE EMWIN WEB SITE WILL ADD

SPECIFICATIONS AND A USER GUIDE TO ASSIST MANUFACTURERS IN

DESIGNING RETROFITS TO EXISTING SYSTEMS OR NEW RECEIVERS.

 

WE WILL USE EMAILS AND DISCUSSION GROUP TOPICS THAT WE RECEIVE TO

UPDATE THE EMWIN FREQUENTLY ASKED QUESTIONS /FAQS/ LOCATED ON THE

EMWIN INDEX PAGE.  CLICK ON /CONTACT US/ TO SUBMIT VIA EMAIL

ADDITIONAL QUESTIONS ABOUT THE TRANSITION.

 

HERE IS A BRIEF RECAP...EMWIN IS NOW BROADCAST FROM GOES

/GEOSTATIONARY OPERATIONAL ENVIRONMENTAL SATELLITE/ EAST AND WEST

SATELLITES.  WHEN THE NEXT GENERATION GOES SATELLITE SERIES

(GOES-N AND BEYOND) BECOMES OPERATIONAL... THE EMWIN SIGNAL WILL

NO LONGER BE BROADCAST IN ITS CURRENT FORM.  INTERNATIONAL

AGREEMENTS CALLED FOR A REDUCTION OF THE EMWIN BROADCAST POWER

LEVEL.  CURRENTLY... GOES-N IS SCHEDULED FOR LAUNCH IN DECEMBER

2004... FOLLOWED BY A SIX MONTH CHECK-OUT PERIOD... WHICH WILL

INCLUDE A SCHEDULED TEST PERIOD FOR USERS OR VENDORS.  FOLLOWING

THE CHECK-OUT PERIOD... THE SATELLITE WILL BE PLACED IN STORAGE

IN ORBIT UNTIL NEEDED OPERATIONALLY.  TRANSITION OF THE EMWIN

BROADCAST TO GOES-N WILL NOT OCCUR UNTIL SOMETIME BETWEEN JULY

2005 AND 2008... BARRING MULTIPLE CATASTROPHIC SATELLITE

FAILURES.  MAJOR DIFFERENCES BETWEEN THE PRESENT AND NEW EMWIN

SYSTEM ARE...      

     - PROVISION OF A DEDICATED TRANSPONDER OPERATING AT THE

     LOWER POWER AND ON A DIFFERENT FREQUENCY

     - USE OF A MORE EFFICIENT MODULATION AND ERROR CORRECTION

     SCHEMES TO COMPENSATE FOR THE POWER REDUCTION.

 

THESE CHANGES IN THE SATELLITE BROADCAST SYSTEM REQUIRE

SIGNIFICANT CHANGES IN THE COMMERCIAL SATELLITE RECEIVERS

CURRENTLY IN USE, WITH THESE POTENTIAL IMPACTS...

     - THE PROTOTYPE RECEIVER DESIGNED BY NESDIS WILL ALLOW

     COMPUTERS TO USE SOFTWARE /TO BE PROVIDED AT NO COST BY

     NOAA/ TO PERFORM SOME OF THE RECEIVER FUNCTIONS FORMERLY

     DONE BY HARDWARE

     - COMMERCIAL VENDORS MAY ELECT TO USE THE SOFTWARE BASED

     DESIGN OR HARDWARE APPLICATIONS TO MEET THE SYSTEM

     SPECIFICATIONS TO DESIGN CONVERSION KITS FOR RETROFITTING

     CUSTOMER RECEIVERS ALREADY IN USE OR MARKETING NEW RECEIVERS

     - WAYS AND MEANS OF MINIMIZING THE POTENTIAL COST IMPACT ON

     USERS ARE STILL BEING EXPLORED.

 

RELEASE OF EMWIN SPECIFICATIONS AND AN EMWIN USERS MANUAL IS

BEING PLANNED FOR EARLY MARCH 2004.

 

A CONFERENCE FOR MAJOR USERS AND PROSPECTIVE VENDORS IS BEING

PLANNED FOR THE LATTER PART OF APRIL IN SILVER SPRING MARYLAND.

MORE INFORMATION ABOUT THE CONFERENCE IS ALSO EXPECTED TO BE

POSTED ON THE EMWIN WEB SITE IN EARLY MARCH.

 

THE NEXT TRANSITION UPDATE MESSAGE IS PLANNED AFTER THE EMWIN WEB

SITE IS UPDATED TO ANNOUNCE INFORMATION ABOUT THE EMWIN USERS AND

VENDORS CONFERENCE IN LATE APRIL.  FUTURE EMWIN TRANSITION

UPDATES WILL BE DISTRIBUTED THROUGH EMWIN AND ALSO POSTED ON THE

EMWIN INDEX PAGE LISTED ABOVE. 

 

END

$$