Quite ingenious considering it's HF.
I had not heard that story and find it fascinating. The source must have used 4 transmitters and 4 antennae? What did they finally find? I'm especially interested in whether they were just showing they could...or if they were actually transmitting information.
What did they finally find? I'm especially interested in whether they were just showing they could...or if they were actually transmitting information.Well, they eventually found the source, but, again, it was a cooperative source in that it wasn't 'running and hiding' and had a very deterministic nature. That makes things a LOT easier. Compare that to a commercial interferering source on UHF that took me a couple years to finally (1st) identify (correlate with a source) and then locate. It was sporadic, non-predictable, and slightly beyond the 'radio horizon' so tropospheric ducting on occasion would enhance it (if you can't 'beam' it except from up on the tower where the main repeater ant is, it makes things difficult).
Anyway, they did find the source for Sam.
Full story here: Sam