The Space Disturbance Monitoring Station of the Institute for Telecommunication Sciences and Aeronomy is located on Elmendorf Air Force Base, near Anchorage, Alaska. The station was formerly the North Pacific Radio Warning Service of the Central Radio Propagation Laboratory, and as such served the government and civilian agencies which operated high frequency communication circuits in the North Pacific area. It was first opened in 1950, and since the military were prime users of the services, the location on Elmendorf Air Force Base was a natural selection.