FIELD: multi-position scanning surveillance systems.
SUBSTANCE: invention relates to multi-position scanning systems for observing objects in semi-active and passive modes. System consists of several receivers (radio, radiometric, optical), which receive signals of reflection or radiation from objects. Disclosed method consists in arrangement of several receivers, their mutual orientation in a single coordinate system, receiving signals from objects in them, calculating conjugation indicators of direction vectors to objects and comparing them with a detection threshold, determining estimates of vectors of spatial coordinates and velocities of detected objects. Objects in each scanning period are ranked according to the degree of importance depending on the range and direction of the velocity vector, and the extrapolated position of each object is found in the order of ranking. After that, n receivers antenna lines of sight are switched in direction of extrapolated position, indices of conjugation of vectors of directions to objects located in the zone of visibility of all receivers are calculated, the indices are compared with a detection threshold and estimates of vectors of spatial coordinates and velocities of detected objects are determined. Found estimates are matched with the previously obtained estimates and groups thereof are formed. Likelihood index is calculated for each group, compared with a likelihood threshold, and false groups are discarded. Further, said operations are repeated in a sequence of several survey periods, after which, at the last period, non-overlapping groups are selected from all obtained groups of estimates in order of the likelihood index, number of selected groups is taken as the number of finally detected objects and estimates of these groups – as estimates of trajectory parameters of objects.
EFFECT: high rate of detecting objects without errors of the first and second kind owing to outputting lines of sight of antennae of receivers to anticipated points in the space of appearance of objects.
1 cl
