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

NPE shift factor: 1.70	NPE shift factor: 1.80	NPE shift factor: 1.84	NPE shift factor: 1.85	NPE shift factor: 1.88
NPE shift factor: 1.90	NPE shift factor: 1.95	NPE shift factor: 2.00	NPE shift factor: 2.05	NPE shift factor: 2.10
NPE shift factor: 2.15	NPE shift factor: 2.20	NPE shift factor: 2.25	NPE shift factor: 2.30