[20070530: radiosonde replacement system-Fwd: ADMIN NOTICE NOUS41 KWBC]

[Linda Miller]

-------- Original Message --------

617 
NOUS41 KWBC 301352
PNSWSH

TECHNICAL IMPLEMENTATION NOTICE 07-39
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
953 AM EDT WED MAY 30 2007
         
TO:  FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER
  WIRE SERVICE /NWWS/ SUBSCRIBERS...EMERGENCY MANAGERS
          WEATHER INFORMATION NETWORK /EMWIN/ SUBSCRIBERS...
          NOAAPORT SUBSCRIBERS...OTHER NATIONAL WEATHER SERVICE
          /NWS/ CUSTOMERS AND PARTNERS...NWS EMPLOYEES

FROM:  JIM OSULLIVAN       
  ACTING CHIEF... OBSERVING SERVICES DIVISION 
  OFFICE OF CLIMATE WATER AND WEATHER SERVICES 

SUBJECT:  FOURTH QUARTER FY07 SCHEDULE: RADIOSONDE REPLACEMENT 
          SYSTEM /RRS/ IMPLEMENTATION WITH TERMINATION OF 
          OPERATIONS OF RADIOTHEODOLITE TRACKING /ART/ AND RADIO   
          DIRECTION FINDING RADIOSONDES

DURING THIS FOURTH QUARTER NWS WILL TERMINATE UPPER AIR 
OBSERVATIONS FROM RADIO DIRECTION FINDING RADIOSONDES AND 
AUTOMATED RADIOTHEODOLITE TRACKING AT THE SIX SITES LISTED BELOW 
ON OR ABOUT THE DATES INDICATED.

SID       STATION NAME        OUTAGE DATE

72768     GLASGOW MT          02 JUL 2007  
74560     LINCOLN IL          16 JUL 2007   
72440     SPRINGFIELD MO      30 JUL 2007    
72634     GAYLORD MI          13 AUG 2007    
72562     NORTH PLATTE NE     28 AUG 2007      
72558     VALLEY NE           08 SEP 2007    

NWS UPPER AIR OBSERVATIONS WILL RESUME APPROXIMATELY 2 WEEKS 
LATER. NWS WILL USE THE RRS WITH GLOBAL POSITIONING SYSTEM /GPS/ 
RADIOSONDES. EACH OF THESE SITES WILL BE OUT OF SERVICE FOR UP 
TO 2 WEEKS. WHEN RESTORED PARTS OF THE UPPER AIR CODED 
MESSAGES WILL BE SIGNIFICANTLY LONGER.

NWS HAS COORDINATED WITH ITS PARTNERS ON THE LONGER LENGTH OF 
THESE MESSAGES.

THE FORMAT OF THE MESSAGES WILL BE THE SAME WMO FORMAT FOR CODED 
UPPER AIR MESSAGES IN USE WITH THE MICROART LEGACY SYSTEM. THE 
NUMBER OF LEVELS IN THE CODED MESSAGES WILL BE TWO TO THREE 
TIMES GREATER FOR THE TTBB AND TTDD. AS A RESULT TWO CATEGORIES 
OF AWIPS TEXT PRODUCTS WILL INCREASE IN SIZE: SGL AND ABV. THE 
NUMBER OF LEVELS IN THE TTAA...TTCC...PPBB AND PPDD PARTS WILL 
BE RELATIVELY UNCHANGED. THESE CHANGES REFLECT UPDATED CODING 
PRACTICES AND HIGHER RESOLUTION LEVEL SELECTION CRITERIA. THE 
MAXIMUM SIZE LIMITS OF THE PARTS OF THE CODED MESSAGES ARE AS 
FOLLOWS: 

     TTAA:   15  LEVELS  
     TTCC:   10  LEVELS     
     TTBB:  135  LEVELS      
     TTDD:   40  LEVELS 
     PPBB:   40  LEVELS  
     PPDD:   40  LEVELS 

IN ADDITION THE 31313 MESSAGE INDICATOR ASSOCIATED WITH VARIOUS 
PARTS OF THE MESSAGE WILL BE INCLUDED WITH EACH PART OF THE 
THERMODYNAMIC MESSAGE PARTS. FOR ADDITIONAL INFORMATION ON THE 
MESSAGE REQUIREMENTS...REFERENCE WMO 306...MANUAL ON CODES... 
INTERNATIONAL CODES...VOLUME 1.1 PART A-ALPHANUMERIC CODES... 
AND WMO 306...MANUAL ON CODES...REGIONAL CODES AND NATIONAL 
CODING PRACTICES...VOLUME II. USERS CAN FIND INFORMATION ON THE 
LEVELS SELECTION CRITERIA USED IN NWS CODING SOFTWARE ONLINE AT  
/USE LOWERCASE LETTERS/:

     HTTP://WWW.UA.NWS.NOAA.GOV

IF YOU HAVE QUESTIONS OR FEEDBACK...PLEASE CONTACT:

     DOMINIC BOSCO
     NATIONAL WEATHER SERVICE / OPS11
     1325 EAST WEST HIGHWAY
     SILVER SPRING MARYLAND 20910
     PHONE: 301-713-1841 EXT. 123 
     E-MAIL: DOMINIC.BOSCO at NOAA.GOV

THIS AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE 
AVAILABLE ONLINE AT /USE LOWER CASE LETTERS/:

     HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM

$$



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