The U.S. Climate Reference Network (USCRN) is a network currently comprised of 121 climate stations installed and maintained since 2000 throughout the continental United States, Alaska, Hawaii, and an experimental site in Canada. The USCRN has recently been funded to add soil moisture, soil temperature and relative humidity to most of the stations.

The primary goal of the USCRN is to provide future long-term homogeneous observations of temperature and precipitation that can be coupled to long-term historical observations for the detection and attribution of present and future climate change.

The U.S. Historical Climatology Network (USHCN) is made up of over 1000 stations. Data is available from as far back as 1900. A NOAA initiative to "modernize" the network is presently underway with the initial goal of installing up-to-date sensors and instruments at 40 sites in 2009. ATDD was chosen by NOAA to be the organization to handle this modernization effort due to our consistently outstanding results.

Our team of 17 technicians, engineers, and administrative specialists in collaboration with the National Climate Data Center have: designed and engineered the systems; developed and refined the procedures for installation and maintenance; developed and implemented site modifications and created the documentation processes and procedures for site visits. Installations, annual preventive maintenance trips along with unscheduled maintenance visits keep our folks on the road up to 100 days a year. When they're not on the road, they're troubleshooting and solving technical issues, calibrating sensors, researching new equipment in testbeds and working together on process improvements to further enhance their maintenance efficiency and documentation accuracy.