Because if it came from the moon there would be a few seconds
delay as it's a long way to the moon and back. If it was back
scatter the signal would show up instantly and would obvious.

John Passaneau W3JXP

I don't buy that argument - when you call someone there is
often a delay of a couple of seconds (that's all it is, 2.5
secs or so) before they reply.

That would work with your own signal being reflected from the
moon vs backscatter, but not in this case.

Derek aa5bt