95%確率円方式による船位誤差界について-II

概要

論文の詳細を見る
For a circular contour, which is one of the methods for indicating an error boundary, the author has studied the conditions for the probability of a ship's position fixed by two position lines lying within a 95% circle by probability integrations. In this case, the coefficient in the equation to indicate the radius is a function of an intersecting angle and an accuracy ratio between two position lines. The author has examined several accuracy ratios and applied the system to the error boundary of a ship's position fixed by two unequally accurate position lines and by three equally accurate position lines. Furthermore, it is shown that the accuracy contour for a fix is an ellipse, whether the accuracies of the position lines are the same or not, and a method is developed to replace an error ellipse for two position lines of unequal accuracy with an ellipse formed by two equal accuracy position lines. The method is extended to three position lines of unequal accuracy. It then becomes possible to indicate an error boundary by a 95% probability circle. In this paper the author described the results with which he applied the system to several concrete examples.
社団法人日本航海学会の論文
1980-08-15