Allied Command Europe Highband

Allied Command Europe Highband, better known as ACE High, was a fixed service NATO radiocommunication and early warning system dating back to 1956.

There used to be 49 troposcatter links augmented by 40 line-of-sight Microwave terrestrial stations, located in nine different NATO countries from northern Norway through central Europe to eastern Turkey.

[2] NATO was established in 1949 with a supreme command (SHAPE) near Versailles, France, and the regional headquarters (RHQ) Allied Forces Northern Europe (AFNORTH) at Kolsås, Norway (responsible for Denmark, Norway and the UK), Allied Forces Central Europe (AFCENT) at Laffaux, France (responsible for Belgium, France, Germany and the Netherlands) and Allied Forces Southern Europe (AFSOUTH) at Naples, Italy (responsible for Italy, Greece and Turkey).

Supreme command, the three RHQ's and all subordinate units used various communication systems to establish contact: high frequency radio networks, VHF transmitters and civil or military landlines.

This network consisted of a number of "backbone" stations covering a 6,800 km (4,200 mi) path from northern Norway to southern Turkey and was initially called the "Over the Horizon Troposperic scatter Communications Net," but was renamed "Allied Command Europe - Highband" (ACE-High).