What was the purpose of operation JUBILEE and what did the Germans think was happening?

JUBILEE was to create a diversion at Dieppe in order to gain access to the radar station. The invasion fleet was ready on August 18. Most people thought that the attack at Dieppe was a failure but the raid was a diversion. The real target was the radar station where a team stole vital equipment. This would help make the D-day invasion easier for Allied bombers. JUBILEE helped the Allies prepare for D-day by designing new equipment, armor and techniques that would result in fewer causalities.