[tsofian]

Originally Posted by ArmySGT.

Even easier...... Damocles was on (in game mode) and recording in it's role as a backup to National command Authority (or atleast Strategic Missile ommand.

If there was a lapse in COMSEC and/or SIGINT, then Damocles may have triangulated the "Unknown". Transmissions from radio, microwave, satellite to LEO, LEO to unknown ground position, and phone lines that should be dead or have an unknown origination code. Then there is RADAR, LIDAR, used to sweep the air above Prime Base even if it is just to assess fallout patterns.

Not just Prime Base, surely as Paiute Place was being put together and the word went out to refugees, so did signals. People, ordinary, Non Projet people must have used CB radios, Shortwave radios, and with barely a hope Cellular phones to try and reach loved ones.

Damocles, is or was, integrated into the Defense Switched Network (DSN) aka AUTOVON, Distant Early Warning, Defense Action Network, and others (presumably) through connections with nearby Sawyer Air Force Base.

Yep
Also JSS https://en.wikipedia.org/wiki/Joint_Surveillance_System