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A SLIDE RULE FOR THE COMPUTATION OF PRECISION TURNS IN AIR SURVEY NAVIGATION
Author(s) -
Walker E.
Publication year - 1964
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/j.1477-9730.1964.tb00384.x
Subject(s) - computation , visual angle , computer science , simulation , algorithm , computer vision
Calculated precision turns can be valuable as an aid to visual navigation at all scales and under all conditions of air survey navigation. The turns can be performed either at a given rate of turn or at a given angle of bank, and a slide rule has been developed at the International Training Centre for Aerial Survey, Delft, on which the necessary calculations for either case can be performed quickly and easily. The accuracy of location aimed at is such that the threshold of the new run presents an angle‐off of not more than 3° on the completion of the turn. Examples show that this can be achieved in normal practice.