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NOUS41 KWBC 161228
PNSWSH
TECHNICAL IMPLEMENTATION NOTICE 07-55
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
830 AM EDT THU AUG 16 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: MIKE CAMPBELL
CHIEF...OBSERVING SERVICES DIVISION
OFFICE OF CLIMATE WATER WEATHER SERVICES
SUBJECT: OPERATION ASSESSMENT TEST /OAT/ RADIOSONDE REPLACEMENT
SYSTEM/RRS/ AND FLIGHT OF RECORD
ON AUGUST 17 2007...NWS GAYLORD...MICHIGAN...WILL TERMINATE
UPPER AIR OBSERVATIONS USING THE RADIO DIRECTION FINDING
RADIOSONDES AND TRACKING SYSTEM. THE UPPER AIR OPERATIONS WILL BE
RESTORED USING THE RADIOSONDE REPLACEMENT SYSTEM WITH THE NEW
GLOBAL POSITIONING SYTEM /GPS/ RADIOSONDES. THE SITE WILL BE OUT OF
SERVICE UNTIL AUGUST 27 2007. ONCE RESTORED SOME PARTS OF THE UPPER
AIR CODED MESSAGES WILL BE SIGNIFICANTLY LONGER.
STARTING NO SOONER THAN THE 0000 COORDINATED UNIVERSAL TIME /UTC/ ON
OR ABOUT AUGUST 27 2007...WITH THE IMPLEMENTATION OF THE RADIOSONDE
REPLACEMENT SYSTEM AT GAYLORD...THERE WILL BE A CHANGE IN THE LENGTH
OF CODED 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 TDD PARTS. THE NUMBER OF LEVELS
IN THE TTAA... TTCC... PPBB... AND PPDD PARTS WILL BE RELATIVELY
UNCHANGED. THESE CHANGES REFLECT UPDATED CODING PRACTICES AND
HIGHTER RESOLUTION LEVEL SELECTION CRITERIA. THE MAXIMUM SIZE LIMITS
OF THE PARTS OF THE CODED MESSAGES FOLLOW:
RRS SITE COMPONENT COMMISSIONING PLAN SEPTEMBER 2005 13
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 THE
VARIOUS PARTS OF THE MESSAGE WILL BE INCLUDED WITH EACH PART OF
THE THERMODYNAMIC MESSAGE PARTS. FOR ADDITIONAL INFORMATION ON
THE MESSAGE REQUIREMENTS PLEASE REFERENCE THE 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. INFORMATION ON THE
LEVELS SELECTION CRITERIA USED IN NWS CODING SOFTWARE AT THE
FOLLOWING SITE UNDER THE NWS RADIOSONDE REPLACEMENT SYSTEM /USE
LOWERCASE LETTERS/.
HTTP://WWW.UA.NWS.NOAA.GOV
IF YOU HAVE QUESTIONS OR FEEDBACK... CONTACT:
CARL BOWER
NATIONAL WEATHER SERVICE
W/OS7X2
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
PHONE: 301-713-0722 EXT. 145
E-MAIL: CARL.BOWER@xxxxxxxx
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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