Assessment of Optical Turbulence Profiles Derived From Probabilistic Climatology
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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This research e ort assesses the performance of the High Energy Laser End-to-End Operational Simulation HELEEOS Climatological C2noptical turbulence model. Path-integrated C2nvalues of two HELEEOS optical turbulence pro les at 3 distinct operational altitudes are compared to values determined from measured thermosonde data. HELEEOS desert and mid-latitude sites are selected from the Extreme and Percentile Environmental Reference Tables ExPERT database for comparison to the thermosonde data. Statistical equivalence of the two datasets is determined through a Design of Experiments DOE factorial test to within 80 con dence. The HELEEOS pro les are shown to be equivalent to the thermosonde data for a 500 m boundary layer pro le. Deterministic values of the 80 con dence intervals are established. The HELEEOS optical turbulence model is used as the input turbulence model for wave optics simulations. Long-term spot size measurements show that HELEEOS outperforms empirical turbulence models by as much as 17. Recommendations are made to improve the HELEEOS graphical outputs and reference tables.