DFS radar tower

My bike ride today brought me close to Frankfurt, especially Frankfurt airport. I took a picture of the radar tower in or near Langen. The German airspace control DFS is located in Langen, amongst others.

(I tried to find the tower in maps.google, but couldn't. So it might also be a radar tower of the German army. At least the starting airplane, visible above the tower, is farther away than the tower. That means the airport itself is behind the tower, the tower is indeed Langen.)