The optimization of ZA Vs NPE (using NPE distribution) (corsika and observational data (iron))

NPE shift factor: 0.70	NPE shift factor: 0.75	NPE shift factor: 0.80	NPE shift factor: 0.85
NPE shift factor: 0.88	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: 0.95	NPE shift factor: 1.00	NPE shift factor: 1.05
NPE shift factor: 1.10