This is a new (to us) angle on certain lines of enquiry re. planetary theory in Talkshop blog posts.
John H. Nelson’s theory of propagation: Is there anything to it? – By David Dalton, K9WQ
In March 1951, John H. Nelson, an engineer for the RCA Communications Co. in New York, published an article in RCA Review describing a theory for predicting shortwave radio propagation over the North Atlantic. Nelson developed the theory by comparing planetary positions relative to the sun with logs of propagation conditions maintained at RCA’s receiving station at Riverhead, Long Island.
The article said that certain configurations of the six inner planets correlated with degraded propagation conditions. Nelson was not dogmatic about his theory. Rather, in the article and in a follow-up article published in May 1952, he encouraged further study [see footnote]. Nelson believed that his theory was about 85 percent accurate in its predictions.