Cheers for that, we're a lot more on the same page now - I got a little time with fancy detectors but principally spent years with straight up crystal packs and scintillation energy bucket counting, calibrations against doped concrete pads, stacked atmosphere flights, open water and known ground truth flights, geometry configurations, temperature control, and a banquet of derived corrections for radiometric mapping - we also ran passive magnetics, LIDAR, gravity, microwave et al in parallel.

Notable sites included most of the hotter mine sites about the globe, Finnish / Russian sea borders, and the odd live underground test here and there (Pokhran-II exchange) .. but enough about that.