Analyzing the Effects of Meteorology on Radar Measured Index of Refraction Structure Parameter

摘要

Forecasting optical turbulence is essential for the Air Force's Airborne Laser program to optimize placement of aircraft. To find bow meteorology affects C(sub n)(sup 2), the intensity of turbulence in the index of refraction, case studies of synoptically interesting times are first chosen. Correlation coefficients are then computed between radar measured C(sub n)(2) and meteorological quantities. The potential for mechanically turbulent activity is looked at. In the analysis of this work, six meteorological features were found likely to affect C(sub n)(sup 2). Two features associated with affecting potential refractivity, and thus C(sub n)(sup 2), are jets and inversions. North of jet core level in the northern hemisphere, higher values of C(sub n)(sup 2) can be found north of the core, with lower values to the south. With temperature inversions, typically higher values of can be found just above inversions with comparatively lower C(sub n)(sup 2) values underneath. The remaining four features affecting C(sub n)(sup 2) are not directly related to potential refractivity alone. The first is bands of high C(sub n)(sup 2) occurring within regions of strong vertical wind shear. The second feature is high C(sub n)(sup 2) occasionally seen underneath inversions during the approach of jets that are associated with gravity wave activity. The other two meteorological features are tropopause boundaries and trough passage.