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-------- Original Message -------- Subject: ADMIN NOTICE NOUS41 KWBC Date: Mon, 1 Oct 2012 13:06:10 -0600 From: Unidata Local Data Manager <ldm@xxxxxxxxxxxxxxxx> To: ldmnotices@xxxxxxxxxxxxxxxx 402 NOUS41 KWBC 011906 PNSWSH Technical Implementation Notice 12-26, Corrected National Weather Service Headquarters Washington DC 305 PM EDT Mon Oct 1 2012TO: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPORT
Other NWS Partners and Employees
FROM: Kevin Schrab
Chief, Observing Services Division
Office of Climate, Water, and Weather Services
SUBJECT: Corrected: 2012 Dates for Termination of Automated
Radiotheodolite Tracking (ART) and Radio Direction
Finding Radiosondes (RDF) with Installation of
Radiosonde Replacement Systems (RRS)
Corrected to include the code 045208 established for the new
radiosonde in service at these three sites.
Three Upper Air (UA) sites are scheduled to begin RRS service in
the next 4 months in 2012.
STATION NAME WMO # STN ID RRS START ON/ABOUT
------------ ----- ------ ------------------
CARIBOU 72712 KCAR 15 June 2012
GUAM 91212 PGUM 26 July 2012
BARROW 70026 PABR 30 Aug 2012
The NWS UA observations will gather meteorological data from
Global Positioning System (GPS) radiosondes of a new type: the
Vaisala RS92-NGP. The assigned equipment code is 045208. The
leading 04 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 TTAA, TTBB, TTCC, and TTDD messages.
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 of 1984 (WGS84) standard.
Parts of the UA 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
UA 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, 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:
http://www.ua.nws.noaa.gov
If you have questions or feedback, please contact:
Joseph Facundo
Observing Systems Branch (OPS22)
National Weather Service
1325 East West Highway
Silver Spring, Maryland 20910
301-713-2093 Ext. 101
Joseph.Facundo@xxxxxxxx
National Technical Implementation notices are online at:
http://www.weather.gov/os/notif.htm
$$
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