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-------- Original Message --------170 NOUS41 KWBC 151247
PNSWSH TECHNICAL IMPLEMENTATION NOTICE 10-06 NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC 745 AM EST FRI JAN 15 2010TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS...AND NWS EMPLOYEES
FROM: KEVIN SCHRAB
CHIEF... OBSERVING SERVICES DIVISION
OFFICE OF CLIMATE WATER AND WEATHER SERVICES
SUBJECT: SECOND QUARTER 2010 SCHEDULE DATES FOR TERMINATION
OF RADIOTHEODOLITE TRACKING /ART/ AND RADIO DIRECTION
FINDING RADIOSONDES /RDF/ WITH INSTALLATION OF
RADIOSONDE REPLACEMENT SYSTEMS /RRS/
TWO UPPER AIR /UA/ SITES ARE SCHEDULED TO RECEIVE RRS UPGRADES
IN THE SECOND QUARTER OF 2010. THE NEXT ART/RDF TECHNICAL
IMPLEMENTATION NOTICE /TIN/ WILL BE ISSUED IN MARCH.
SID STATION NAME OUTAGE DATES 78526 SAN JUAN PR 19 FEB 2010 72201 KEY WEST FL 12 MAR 2010EACH UPPER AIR SITE WILL BE OUT OF SERVICE FOR ABOUT 10 DAYS. WHEN NWS UA OBSERVATIONS RESUME... THE RRS WILL BE GATHERING METEOROLOGICAL DATA FROM GLOBAL POSITIONING SYSTEM /GPS/ RADIOSONDES. THE NWS DESCRIBES THE RRS RELEASE POINT LOCATION WITH THE NATIONAL GEODETIC SURVEY /NGS/ OPUS SOLUTION. THIS IS A DATUM COMBINATION THAT RELIES ON NORTH AMERICAN DATUM OF 1983 /NAD83/ FOR LATITUDE AND LONGITUDE WHEREAS THE RELEASE POINT ELEVATION IS BASED ON NORTH AMERICAN VERTICAL DATUM 1988 /NAVD88/ WITH THE GEOID03 MODEL. BY CONTRAST THE GPS RADIOSONDE FLIGHT INFORMATION OF LATITUDE AND LONGITUDE AND ALTITUDE WILL RELY ON THE WORLD GEODETIC SYSTEM 1984 /WGS84/ STANDARD. BE ADVISED PARTS OF THE UPPER AIR CODED MESSAGES WILL BE SIGNIFICANTLY LONGER WITH RRS CONVERSION. 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 USED 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: IVAN NAVARRO NATIONAL WEATHER SERVICE / OPS11 1325 EAST WEST HIGHWAY SILVER SPRING MARYLAND 20910301-713-1843 EXT. 134 IVAN.NAVARRO@xxxxxxxx
NWS NATIONAL TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT /USE LOWERCASE/:
HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM $$ NNNN
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