From 1949 to March 10, 1967, France's military operated within the NATO command structure, integrating its air defense system with that of NATO through the indirect use of American aid funds. Between 1953 and 1958, the D.A.T. built a radar station in an old troops shelter near the fort, called Ouvrage "G". Called "Station Maître Radar 60/921", it was used beginning in 1959, covering an area on the surface of three times the area of the troops shelter.
Ouvrage "G" complemented Ouvrage F, another D.A.T. station located at the old Fort François de Guise at Metz, while Ouvrage H was established as Base aérienne 901 Drachenbronn/Station Maître Radar 50/921 in the former Maginot Ouvrage Hochwald. Ouvrage "G" was equipped with seven radar antennas installed on top of the fort. The principal radars are presently located on the Ballon de Servance.The Ouvrage « G » is composed, at this creation, to 3 elements:
Wikipedia https://en.wikipedia.org/wiki/NATO_Ouvrage_"G"
Coordinates 47°39'34.908" N 6°49'2.078" E