STUDIES OF UNCONTROLLED AIR TRAFFIC PATTERNS Phase Ⅰ Report

摘要

This report describes results of a HASA sponsored study to investigate and analyze the general aviation air traffic flow patterns at uncontrolled airports and to develop traffic pattern concepts which minimize the mid-air collision hazard in uncontrolled airspace. An analytical approach to evaluate mid-air collision hazard probability as a function of traffic densities is developed which is basically independent of path structure. Two methods of generating space-time interrelationships between terminal area aircraft are presented. One is a deterministic model to generate pseudo-random aircraft tracks and this is compared with analyses of results from available real data. Some hazard measures are presented for selected traffic densities. A second model which is a statistical model in preliminary form is discussed. An analytical expression for the statistical description of procedure path deviations is derived.