Unless they received military assurances. There were a lot of DoD / armed forces mentions in the article...
Edit: And now that I think about it... you'd imagine the minimum tracking size of the US radars would be fairly classified. And likely something not bandied about the FCC in detail.
Edit: And now that I think about it... you'd imagine the minimum tracking size of the US radars would be fairly classified. And likely something not bandied about the FCC in detail.