That HAM operator was Duncan Lunan, a Scottish author of science fiction, with a focus on astronomy and spaceflight. Lunan claimed, in an article in the British Interplanetary Society’s magazine, Spaceflight, that he had encountered and interpreted a signal from an alien probe somewhere in orbit around the Earth. He said that the same signal had previously been detected by researchers in the 1920’s who were studying the long delayed echo effect (or LDE), but that they had disregarded the encoded message as having been an echo of an Earth-originating signal bouncing off of either the moon or Earth’s upper atmosphere. In his article, Lunan relayed the decoded message as follows: “Start here. Our home is Upsilon Bootes, which is a double star. We live on the sixth planet of seven, coming from the sun, which is the larger of the two. Our sixth planet has one moon. Our fourth planet has three. Our first and third planets each have one. Our probe is in the position of Arcturus, known in our maps.” Many believe, including Lunan, that this message came from a Bracewell probe in orbit around Earth. A Bracewell probe is a theoretical autonomous satellite built to remotely explore distant star systems with the expressed purpose of communicating with alien civilizations. An interesting coincidence in all this, is that the concept of a Bracewell probe was first proposed by telecommunication and radioscience engineer Ronald Bracewell, in a paper published in 1960, the same year Black Knight was discovered. A notable example of a Bracewell probe is the device that featured in the Star Trek: The Next Generation episode ‘The Inner Light’ (season five, episode 25).

http://mysteriousuniverse.org/2014/02/the-black-knight-satellite-bracewell-probes-and-phillip-k-dick/