Abstract: A system for measuring unambiguous target range for targets at high velocities in which target range and doppler frequency data from three sequential transmission dwells of radar returns are stored, each dwell having a different pulse repetition frequency (PRF). The dwell storage unit which includes three sets of dynamic registers is loaded and unloaded serially with respect to range and supplied to a 17 path doppler frequency correlator. After the three dwell storage registers have been loaded with a basic PRF plus jitter, the range interval unfolding is performed by a recirculation process in each of the registers. During recirculation the data is applied to a correlation unit, the purpose of which is to insure that the velocity of the target satisfies a 17 path algorithm across three adjacent dwells in at least one of five range azimuth profiles or paths.