NOUS41 KWBC 151940



Technical Implementation Notice 13-24

National Weather Service Headquarters Washington DC

340 PM EDT Thu Aug 15, 2013


TO:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS Partners and Employees


FROM:      Kevin Schrab      

           Chief, Observing Services Division

           Office of Climate, Water, and Weather Services


SUBJECT:   Kodiak Upper Air (UA) Site Conversion from Automated

           Radiotheodolite Tracking (ART) and Radio Direction

           Finding Radiosondes (RDF) to LMG6 Ground Tracking and

           LMS6 Radiosondes On or about September 20, 2013


On or about September 20, 2013, the Kodiak UA site will

terminate RDF and ART operations and begin using the Lockheed

Martin Sippican (LMS) 403 MHZ tracking system (LMG6).  During

the transition, UA observations may be out for up to 3 days.


NAME           WMO#      SID          LMS START DATE

KODIAK         70350     PADQ         September 18-25 2013


When implementation is complete, the Kodiak site will gather

meteorological data from the newest category of Global

Positioning System (GPS) radiosondes the LMS6.  The assigned

equipment code is: 48208. The leading 4 indicates a correction

is applied for solar and infrared exposure. The 08 suffix

indicates automatic satellite navigation. This code appears

immediately after the heading, 31313, in the TAA, TTB, TTC and

TTDD messages.


The format of the messages will be the same WMO format for coded

UA messages used with the MicroArt legacy system. The number of

levels in the TTAA, TTBB, TTCC, TTDD, PPBB and PPDD parts will

be relatively unchanged.


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 please

see the WMO 306 Manual on Codes (International Codes):  Volume

I.1 Part A–Alphanumeric Codes, and Volume II, Regional Codes and

National Coding Practices. Users can find information on the

levels selection criteria used in NWS coding software online at:


If you have questions or feedback, please contact:


  Ivan Navarro

  NWS Engineering and Acquisition Branch (OPS11)

  Silver Spring, Maryland 20910

  301-713-1841 Ext. 123


NWS National Technical Implementation notices are online at: