[nws-changes] 20120202: transition of radiosondes Fwd: ADMIN NOTICE NOUS41 KWBC

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: [nws-changes] 20120202: transition of radiosondes Fwd: ADMIN NOTICE NOUS41 KWBC
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Fri, 03 Feb 2012 07:54:13 -0700

-------- Original Message --------

199
NOUS41 KWBC 022140
PNSWSH

Technical Implementation Notice 12-07
National Weather Service Headquarters Washington DC
440 PM EDT Thu Feb 2, 2012

TO:       Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPORT
          Other NWS Partners and Employees

FROM:     Joseph Facundo
          Chief, Observing Systems Branch
          Field Systems Operation Center

SUBJECT:  2012 Dates for Transition from the Lockheed Martin
Sippican 1680 MHz(B2) Radiosonde to the Vaisala Model
RS92-D Radiosonde.

From April 1 through June 30, 2012, Eight Cooperative Hurricane

Upper Air Station (CHUAS) sites are scheduled to Transition to
the Vaisala RS92-D Radiosonde. The specific sites are as
follows:

STATION NAME       WMO #  STN ID

BARBADOS           78954  TBPB
BELIZE             78583  MZBZ
DOMINICAN REPUBLIC 78486  MDSD
GRAND CAYMAN       78384  MWCR
JAMAICA            78397  MKJP
SAN ANDRES         80001  SKSP
ST. MAARTEN        78866  TNCM
TRINIDAD           78970  TTPP

These Upper Air sites are not expected to be out of service
during this transition.

NWS is transitioning from the Lockheed Martin Sippican 1680 MHz
B2 Radiosonde to a Vaisala Model RS92-D Radiosonde. The major
changes are a change from 6 second data to 1 second data. The
RS92-D also has a faster responding temperature and relative
humidity sensor and is equipped with a digital 1680 MHz
transmitter. The Temperature sensor is a capacitive wire. The
Humidity sensor is a thin-film capacitor, heated twin sensor and
the RS92-D has a silicon based pressure sensor.

The format of the messages will be the same WMO format for coded
UA messages used with the IMS-1500 system. The coded message
31313 group from these Vaisala RS92-D radiosondes will indicate
that the temperature data is not corrected for radiation.

The vendor has provided the Solar Correction for the Vaisala
RS92-D radiosonde. The Table is the RSN2005 Radiation
correction. The corrections in the table are a function of
pressure and sun elevation angle. The corrections are subtracted
from the measured Temperature.

http://www.nws.noaa.gov/os/notification/resources/rsn.pdf


For additional information on the coded message requirements,
see WMO 306 Manual on Codes (International Codes):  Volume I.1
Part A - Alphanumeric Codes and Volume II Regional Codes and
National Coding Practices(WMO Region IV).

If you have questions or feedback, please contact:

  Jean Tomkowicz
  Maintenance Branch (OPS12)
  National Weather Service
  Silver Spring, Maryland 20910
  301-713-0259 Ext. 133
  Jean.Tomkowicz@xxxxxxxx

National Technical Implementation notices are online:

  http://www.weather.gov/os/notif.htm


$$