How do you think 300s are made?
My thoughts exactly!
What the hell is that thing!!
It is a radiometric survey antenna. Radiometric surveys detect and map natural radioactive emanations, called gamma rays, from rocks and soils. All detectable gamma radiation from earth materials come from the natural decay products of only three elements, i.e. uranium, thorium, and potassium. In parallel with the magnetic method, that is capable of detecting and mapping only magnetite (and occasionally pyrrhotite) in soils and rocks, so the radiometric method is capable of detecting only the presence of U, Th, and K at the surface of the ground.
The basic purpose of radiometric surveys is to determine either the absolute or relative amounts of U, Th., and K in the surface rocks and soils and which data is useful for geological interpretation.
In a sentance; radiometrics are used for airborne mineral surveys!
Earl