The Bulgarian Air Force's Air Sovereignty Operations Centre is located in Sofia and reports to CAOC Torrejón. The Bulgarian Air Force fields three control and surveillance zones, which operate obsolete Soviet-era radars. The Bulgarian Air Force intends to replace these radars with fewer, but more capable Western 3-D radars as soon as possible. The future locations of the new radars are as of 2018 unknown. The Royal Canadian Air Force's control centres and radar stations are part of the Canadian/American North American Aerospace Defense Command. The Croatian Air Force and Air Defense's Airspace Surveillance Centre is headquartered in Podvornica and reports to CAOC Torrejón. The Czech Air Force's Control and Reporting Centre is located in Hlavenec and reports to CAOC Uedem. The Royal Danish Air Force's Combined Air Operations Centre (CAOC 1) in Finderup was deactivated in 2008 and replaced at the same location by the Combined Air Operations Centre Finderup (CAOC F), which had responsibility for the airspaces of Iceland, Norway, Denmark and the United Kingdom. CAOC F was deactivated in 2013 and its responsibilities were transferred to CAOC Uedem in Germany. The national Danish Control and Reporting Centre is located at Karup Air Base and it reports to CAOC Uedem. The Thule Air Base in Greenland is a United States Air Force installation and its radars are part of the North American Aerospace Defense Command. The Estonian Air Force's Air Operations Control Centre is located at Ämari Air Base and reports to the Baltic Air Surveillance Network's Regional Airspace Surveillance Coordination Centre (RASCC) in Karmėlava, Lithuania, which in turn reports to CAOC Uedem. The French Air Force's Air Operations Centre is located at Mont Verdun Air Base and reports to CAOC Uedem. Most French radar sites use the PALMIER radar, which is being taken out of service. By 2022 all PALMIER radars will have been replaced with new radar stations using the GM 403 radar. Additionally the French Air Force fields a GM 406 radar at the Cayenne-Rochambeau Air Base in French Guiana to protect the Guiana Space Centre in Kourou. The German Air Force's Combined Air Operations Centre (CAOC 2) in Uedem was deactivated in 2008 and reactivated as CAOC Uedem in 2013. CAOC Uedem is responsible for the NATO airspace North of the Alps.