So really - what we each said doesn’t contradict each other ;-) You have a higher magnitude than my memory has stored in it - but we’re in the same ball park.
My statements are from memories at a ham club meeting I attended in 1982 - so please forgive the slight variance ;-) The officer had come down from Vandenburg AFB to Santa Barbara.
I wasn’t intending to contradict you - sorry if I came off that way - this is just what traceable open-sources say - and thought you’d be interested. In engineering terms 30 vs 50 (just a few dB among friends!) isn’t that significant, and doesn’t alter the remediation requirement or methods if you are concerned with the threat.