The optimization of ZA Vs CoGZ (corsika and observational data (iron))

NPE shift factor: 0.80	NPE shift factor: 0.85	NPE shift factor: 0.87	NPE shift factor: 0.89
NPE shift factor: 0.90	NPE shift factor: 0.91	NPE shift factor: 0.92	NPE shift factor: 0.93
NPE shift factor: 0.94	NPE shift factor: 0.95	NPE shift factor: 0.96	NPE shift factor: 0.98
NPE shift factor: 1.00	NPE shift factor: 1.05	NPE shift factor: 1.10