Satellite map of Graves (system)
GRAVES (Grand Réseau Adapté à la Veille Spatiale) is a French radar-based space surveillance system, akin to the American NAVSPASUR. Using radar measurements, the French Air Force is able to spot satellites orbiting the Earth and determine their orbit.
Latitude: 47° 20' 52.80" N
Longitude: 5° 30' 54.36" E