Is there an open-source alternative that serves the same purpose?
Furthermore, in the proliferation arena, it's possible to map breeder reactors to rough regions using terrestrial antineutrino mapping like KamLAND and what was Borexino. These aren't really conducive to open source initiatives because of their civil engineering burdens of scale (unless one has a mine or a missile silo) and so need to be state/academic efforts until some clever engineering might make them possible (don't see how it's possible because of physics) on the surface and at smaller scales.