 However, the Soviets found out about it as early as 1975 and began taking preventative measures to stop their radio communications from being tapped into, including the replacement of satellite dishes with landlines.In addition, Geoffrey Prime, a British member of the Government Communication Headquarters, had contacts with the KGB and funneled various information regarding US satellite intelligence, which may have included details on Canyon.The Canyon program was succeeded by Chalet/Vortex, whose maiden voyage took place in June 1978.