GPS satellites have broadcast a "numbers station" in their public signals

Direct link to PDF (go to page 62): https://cdn.coverstand.com/61061/865273/2c88ea662e2b57478723...

(Their "digital publication" link is pretty limited, cannot be zoomed and has no in-page keyboard navigation.. What's up with people building useless document viewers when we had nice PDFs already)

Direct link to the publication

https://lsc-pagepro.mydigitalpublication.com/publication/?i=...