Geophysical Intelligence
(US Army Field Manual 2-0) defines geophysical intelligence as a branch of MASINT. "it involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances."
Read more about this topic: National Technical Means Of Verification
Famous quotes containing the word intelligence:
“For passion, be it observed, brings insight with it; it can give a sort of intelligence to simpletons, fools, and idiots, especially during youth.”
—Honoré De Balzac (1799–1850)