ESRL Global Systems Division

ESRL Operates Two Most Popular Stations for CORS Usage

Using a new World Wide Web application developed by Michelle Ho of NOAA's National Geodetic Survey (NGS) we are able to see how many GPS Continuously Operating Reference Stations (CORS) data sets were provided via the "User-Friendly" CORS (UFCORS) interface for each station in the National CORS network during a specified month or a specified year. Cindy Craig (also with NGS) applied this utility to create a map showing approximately how many CORS data sets were provided by each individual station in 2006.

Two GPS sites established by ESRL's Global Systems Division (GSD) for atmospheric research provided nearly 14,000 data sets to users worldwide in 2006, ranking number one and two with respect to all UFCORS usage. The total number of data sets downloaded for the entire CORS network represents a 28% increase over the usage via the Web-friendly utility in 2005.

ESRL's GSD established the world's first GPS network dedicated to atmospheric remote sensing. This project (GPS-Met) was started by NOAA Research in collaboration with several government agencies and academic institutions. When GPS-Met was started in 1994, GSD needed a supply of GPS observations in real time but only a few CORS sites in the United States met this criterion. GSD installed about 50 GPS receivers, including the two most popular UFCORS stations in the U.S. located at the NOAA David Skaggs Research Center in Boulder, CO and at the NOAA Wind Profiler Site near Aztec, NM.

NGS, an office of NOAA's National Ocean Service, now coordinates two networks of continuously operating reference stations (CORS): the National CORS network and the Cooperative network. Each CORS site provides Global Positioning System (GPS) carrier phase and code range measurements in support of 3-dimensional positioning activities throughout the United States and its territories.

Our sites provide critical observations for a large number of applications other than atmospheric research that also require high-accuracy GPS data. Users include public and private surveyors; engineers; Earth scientists; land-use planners; federal, state, and local government agencies; the private sector; and academia. This is a testimony to the accuracy and reliability of the data ESRL has provided for more than a decade to help meet NOAA's mission strategy to monitor and observe.

Contact information
Name: Seth I Gutman
Tel: 303-497-7031