-------- Original Message --------
260
NOUS41 KWBC 091706
PNSWSH
TECHNICAL IMPLEMENTATION NOTICE 08-41
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
106 PM EDT FRI MAY 09 2008
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
OTHER NWS PARTNERS...AND NWS EMPLOYEES
FROM: KEVIN SCHRAB
CHIEF... OBSERVING SERVICES DIVISION
OFFICE OF CLIMATE WATER AND WEATHER SERVICES
SUBJECT: FY08 SCHEDULE RADIOSONDE REPLACEMENT SYSTEM /RRS/
IMPLEMENTATION WITH TERMINATION OF OPERATIONS OF
RADIOTHEODOLITE TRACKING /ART/ AND RADIO DIRECTION
FINDING RADIOSONDES
NWS CHARLESTON SOUTH CAROLINA AND ANCHORAGE ALASKA WILL CONVERT
TO RRS TECHNOLOGY IN FY08. NWS WILL TERMINATE UPPER AIR
OBSERVATIONS FROM RADIO DIRECTION FINDING RADIOSONDES AND
AUTOMATED RADIOTHEODOLITE TRACKING AT THE TWO SITES LISTED BELOW
ON OR ABOUT THE DATES INDICATED.
SID STATION NAME OUTAGE DATE
72208 CHARLESTON SC 12 JUN 2008
70273 ANCHORAGE AK 13 JUL 2008
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 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:
DOMINIC BOSCO
NATIONAL WEATHER SERVICE / OPS11
1325 EAST WEST HIGHWAY
SILVER SPRING MARYLAND 20910
PHONE: 301-713-1841 EXT. 123
E-MAIL: DOMINIC.BOSCO@xxxxxxxx
NWS TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT
/USE LOWER CASE/:
HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
$$