Research on low-angle altitude measurement of slow target

Computation method of complex monopulse ratio based on multipath effect is discussed. Through analyzing the principle of low-angle altitude measurement which bases on multipath effect of step swept frequency, a new low-angle altitude measurement method is developed, which uses multipath varying effect of real part of complex monopulse ratio during step swept frequency. Simulation shows that this new method is effective for low-angle altitude measurement for the slow target.