Thule Air Base : Thule Tracking Station : GREENLAND POTUS - Greenland - MISSILE WARNING, MISSILE DEFENSE, SPACE SURVEILLANCE Thule is the United States Department of Defense’s northernmost installation - (76 32' north latitude, 68 50' west longitude) located 750 miles north of the Arctic Circle, and 947 miles south of the North Pole on the northwest side of the island of Greenland. It is approximately 550 miles east of the North Magnetic Pole. Thule exists today as a result of agreements between the United States and the Kingdom of Denmark specifically to address mutual defense. Strategically, Thule’s “Top of the World” vantage point enables the Air Force core function of space superiority. Thule supports missile warning, missile defense and space surveillance missions from the solid-state phased-array radar operated by the 12th Space Warning Squadron and satellite command and control through the Thule tracking station, one of seven remote tracking stations in the Air Force Satellite Control Network operated by the 23rd Space Operations Squadron, Detachment 1. Thule Air Base is home to the 21st Space Wing's global network of sensors providing missile warning, space surveillance and space control to North American Aerospace Defense Command and Air Force Space Command.  https://www.peterson.af.mil/units/821st-air-base-group/ https://www.peterson.af.mil/Portals/15/documents/Thule%20Welcome%20Packet%2010%20May%202019.pdf?