초록 ▼

A method of analysing clusters of bearings (A, B, C, D) taken of distant sources by an array of direction finding stations. Each bearing has an error +E and a triangulation process is used to fix the position of the sources. A combination of bearings is taken one each from the stations. Each bearing

A method of analysing clusters of bearings (A, B, C, D) taken of distant sources by an array of direction finding stations. Each bearing has an error +E and a triangulation process is used to fix the position of the sources. A combination of bearings is taken one each from the stations. Each bearing of the combination is taken in turn as a spoke (3) directed at a source. The triangulation process generates a bar (31, 32, 33) of intersection points along the spoke for each other bearing of the combination, each bar corresponding to the error +E of each bearing. The number of overlaps between pairs of bars along a spoke is totalled to give a spoke score. The spoke scores of all spokes of the combination is summed to form a fix confidence score for a source which may be associated with the combination, or cluster, of bearings. Methods are also provided for rejecting redundant fixes associated with subsets of bearings within a cluster.

대표청구항 ▼

A method of determining a fix confidence score for each source of radiation detected by direction finding stations in known separated locations in a direction finding system, which stations each produce a set of bearings of the sources each detects, each bearing having an error predetermined for the

A method of determining a fix confidence score for each source of radiation detected by direction finding stations in known separated locations in a direction finding system, which stations each produce a set of bearings of the sources each detects, each bearing having an error predetermined for the associated station, and a triangulation process being used to fix the position of the sources, characterised in that there are at least three direction finding stations, in that each fix confidence score is formed for a combination of bearings taken one each from the respective stations, in that one bearing of each of the combinations is taken in turn as a spoke directed at a source, in that the triangulation process generates a bar of intersection points along the spoke for each other bearing of the combination, each bar corresponding to the error of each other bearing, in that the number of overlaps between pairs of bars along the spoke is totalled to give a spoke score, and in that the spoke scores for all spokes of the combination are summed to form the fix confidence score for a source which may be associated with the combination.