Operation N.O.A.H. was a plan put in place by the government of The United States of America as a contingency in the event of the failure of Operation Cobalt. It was mentioned in the 'Conspiracy Theory' section of Radio Waves.
Not much is known about the Operation, other than members of the government would "take to the skies," obviously a reference to them being evacuated.
The existence of such a plan seems likely, as it seems to fit with the real life 'Continuity of Government Plan' (COG) that exists to preserve the government of the U.S. in the event of a catastrophe