PPT Slide
Gravimetry and Gravity Gradiometry for Tunnel Detection
Tunnels detectable to depth approximately
equal to 10 x tunnel diameter
Ex.-- 2 meter diameter tunnel detected
to depth of 20 meters 5 microgal
Higher Resolution than Gravity
Ex.-- 2 meter diameter detectable to
depths ~< 25 m for 1-2 Eotvos
Well-developed, reliable technology; slow
Complex technology; possibility for rapid,
potentially covert deployment; airborne