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aerial photograph of RAF Stenigot with aboandoned tropospheric scatter dishesin the foreground. The base was originally opened as a Chain Home Radar Station to protect Sheffield and Nottingham. The aerial in the top right of the image is one of the last Chain Home antennas still standing. After the war it was used for the ACE High NATO UHF troposcatter Radiocommunication system. Originally there were 82 such stations in 9 countries. The system was decommissioned in the late 1980s when it was replaced with new microwave communications technology.