SAC Contrail Formation Study
AIR FORCE ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER SCOTT AFB IL
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This report documents the results of a study that compares the Appleman contrail forecasting method used at the Air Force Global Weather Central AFGWC with the SAC method using pilot report PIREP data collected by SACDOW between March 1990 and July 1991. The study resulted in development of two other contrail forecasting techniques. The first ETACFCST was developed using discriminant analysis schemes to obtain best fit curves of contrail formation as a function of altitude and temperature, or altitude, temperature, and vertical motion. Statistics showed ETACFCST to be better than either the Appleman or SAC contrail prediction curves. But another technique developed near the end of the study incorporated aircraft engine type as a factor for the first time. The new engine-specific contrail forecasting technique is recommended as a replacement for the Appleman method used at AFGWC.
- Optical Detection and Detectors