Abstract: A video extractor for use in a pulse radar apparatus comprises a shift-register memory for storing a number of words, each of which containing the information about the target position and size, as established for each of the range quants in which the desired range interval is divided. The video extractor thereto contains a range counter, whose counting rate is equal to the rate at which said words are shifted into the memory. An arithmetic unit receives the words shifted out of the memory and, in response to the video and angular data from the pulse radar apparatus and to the range data provided by the range counter, updates if necessary all information contained in said words with each successive range sweep. Because all information referring to one target has to be concentrated in a single word the arithmetic unit transfers the updated information to following or preceding words fetched from the memory.