1. A method for producing an organized subset from a multitude of measurements, wherein each measurement is a value or a set of values that describe characteristics of an assumed target, and wherein said multitude of measurements has been obtained by processing a received electromagnetic signal, the method comprising: arranging the multitude of measurements to a ranked order according to a measurement-specific value, the magnitude of which is assumed to correlate with a reliability of the measurement, initially designating individual measurements in said multitude of measurements as not being associated with a target, calculating an initial posterior probability density, picking from said multitude of measurements a measurement that is not associated with a target, selecting from said multitude of measurements a candidate correlating measurement, calculating a posterior probability density reflective of the picked measurement and the candidate correlating measurement being associated with a same target, as a response to the calculated posterior probability density being indicative of higher probability than the initial posterior probability density, marking the picked measurement and the candidate correlating measurement as being associated with the same target, and outputting, as the organized subset, those measurements that have been marked as being associated with the same target.