A Small Computer Expert System for Low-Level Turbulence Forecasts at Fort Irwin, California
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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This thesis addresses the need for comprehensive, accurate Low Level Turbulence LLT forecasts at the US Armys National Training Center NTC, Ft Irwin, California. A LLT forecast expert system was developed for use on a small computer. The program initially derives a single macroscale turbulence index from observations of current atmospheric lapse rate, pressure tendency, wind speed, and terrain roughness for NTC. Subsequently, a field of values for a Local Scale Turbulence Index LTI is computed as a function of macroscale index, local terrain roughness at 1 km intervals, and winds generated from local observations and a mass consistent wind model. LTI is modified for terrain wake effects and Pilot Reports PIREPS of turbulence in the area.