NOUS41 KWBC 081152



Service Change Notice 16-19

National Weather Service Headquarters Washington DC

752 AM EDT Wed Jun 8 2016


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners, Users and Employees


From:     Joseph Pica 

          Director, Office of Observations


Subject:  GPS-MET Change in Service Provider effective

          September 1, 2016


Global Positioning System Meteorology (GPS-MET) is a ground-

based water vapor observing system, developed and operated by

Office of Oceanic and Atmospheric Research (OAR)/Earth System

Research Laboratory (ESRL)/Global Systems Division (GSD). GSD 

uses GPS radio signal delay measurements to derive Integrated

Precipitable Water (IPW). GSD has been producing these data in a

pseudo-operational role since 2002. NWS has been using the data

operationally since 2005; however, as a research organization,

GSD does not have the capacity, the mission directive, or

funding to sustain this pseudo-operational role. Therefore,

after September 1, 2016, GPS-MET data will no longer be

available from GSD. NWS will obtain the data from a private

vendor via a contract.


This data set will be shared with NOAA staff and will not be

distributed beyond NOAA. NOAA staff will be able to freely and

openly distribute any NOAA-generated and value-added products

integrating TPW data along with other types of data to generate

a new service product. Furthermore, this data set will no longer

be made publicly available on Global Telecommunications System.


NOAA users may access the data via the Meteorological

Assimilation Data Ingest System (MADIS). For access to the MADIS

GPS data, users should contact


Additionally, Advanced Weather Interactive Processing System

(AWIPS) users may access the data via the beta substantiation of

Data Delivery; contact the AWIPS Network Control Facility (NCF)

for instructions on how to configure systems for data display.


For questions on the service impacts of this change, contact:


Jennifer Guillot

Program Management Branch

Office of Observations

Silver Spring, MD 20910



For questions on how to set up a MADIS account, contact:


National Service Change Notices are online at: