In modern science different kind of simulations plays very important role. Halo as an optical phenomena is particular suitable for computer simulations. Optical laws and physics behind halo are well understood.

However, two non-optical parameters need more studies: shape of ice crystals (growth and crystallography of ice) and orientations of free falling ice crystals (aerodynamics). Because these, there are still halo forms which origin are not known.

Halo simulation programs

  • You can download HaloSim3, which is a halo simulation program by Les Cowley and Michael Schroeder.