Halo 2.5 is a software for the input, statistical analysis and output of halo observations. It applies the halo key currently used in the German halo observers group (SHB) of the Arbeitskreis Meteore e.V. (AKM). The program runs under DOS and Microsoft Windows.
The halo key itself is as PDF file available. It is designed to be printed on both sides of one sheed of paper. If you have any questions, please contact the program author Sirko Molau (email@example.com).
If you need further data materials of SHB, please contact Wolfgang Hinz (firstname.lastname@example.org).