| 摘要 |
A coincidence calculating device calculates, based on observation results of an object obtained by an observation device, an inter-area coincidence allowing for a symmetry between specified areas, for at least one pair of observation results out of observation results in a plurality of respective areas, while moving the plurality of areas having specific mutual positional relations on the observation coordinates system of an object (steps 151-160). A positional information calculating device determines the relation between a moved position and inter-area coincidence on observation coordinates systems in a plurality of areas, and determines, based on that relation, for example, the position of observation coordinates system in a plurality of areas that maximizes, for example, inter-area coincidence to thereby determine the position information of an object (step 161), whereby detecting the position information of an object accurately.
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