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:
“Though intelligence is powerless to modify character, it is a dab hand at finding euphemisms for its weaknesses.”
—Quentin Crisp (b. 1908)