| 摘要 |
A method of determining the location of an object uses data representing the bearing of the object from a plurality of observation locations. The method comprises (a) deriving, for each bearing, the coordinates of a point, the coordinates comprising a first value p representing the signed distance between a predetermined location and the closest point on the bearing line, and a second value ¸ representing the angle of the bearing line, using a procedure according to which co-linear bearings of opposite direction have first values which are of opposite sign to each other and second values which differ from each other by À, and (b) deriving parameters defining a curve fitting said points, said parameters representing the object location. Values representing the signal-to-noise ratios associated with the bearing measurements, and values representing the observation locations relative to each other and to the object, can be used to group the bearings for the purpose of weighting their effects on the calculation of object location.
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