Diploma is for HOP member, if he have some interesting observations or rare halos or for 50, 100, 150 and 200 halo days in year. For 50 days with halo is Bronze level, for 100 days is Silver level, for 150 days is Gold level and for 200 (or more) is it Diamond level. For rare halo is Master level. For obtain of diploma Master level is need photo as fact of observation. Diploma of Master level is not for 9° halo and infralateral arc