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Something like a pyramid perhaps... but there would need to be a significant difference in density of the object and the surrounds... that's where the helicopter type would be more maneuverable and useful... they also do this with drones.

Its very expensive though...

They generally are more likely to use ground penetrating radar on archaeological sites.

They generally are more likely to use ground penetrating radar on archaeological sites.

Yes, I know, but GPR uses such a short wavelength I'm not sure it would reach far enough down from the air. Would be great, though, pushing the GPR things around can get boring. Maybe from a low-flying drone, but the energy consumption would be a problem. Hm.

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