摘要: Wake vortex separation standards are used to prevent hazardous wake vortexencounters. This report presents subsequent developments and applications of such a model which was first developed in the early 1980s. A static encounter h... 展开 Wake vortex separation standards are used to prevent hazardous wake vortexencounters. This report presents subsequent developments and applications of such a model which was first developed in the early 1980s. A static encounter hazard model is coupled with a decay model based on sodar measurements of vortex decay. The separation standards and procedures used from 1976 to 1994 are assumed to be safe based on the absence of IFR accidents. Various versions of the model are used to assess how aircraft should be classified and to evaluate the safety of a possible four-class aircraft separation system. Recommendations are made for ways of improving the safe separation models. 收起