FUNCTIONAL RELATIONSHIP OF TIME DENSITY TO THE DETECTION OF DISCRETE RADAR TARGET EVENTS

The purpose of the laboratory study was twofold: (a) To explore the functional relations between time density and the probability that a radar operator would detect several different kinds of scope events, and (b) To develop a 'difficulty index' for these different scope events which could be used in controlling input stimuli for further experimental study on the Cadillac III Combat Information Center system. (Time density is defined as the number of discrete target events occurring per unit time--the time unit used being one minute.) The effects of time density were systematically explored over the range one to five discrete targets events per minute. The functional relation between the probability of detecting discrete events and time density was demonstrated to be probability function.