An improved C2 algorithm for radar low-altitude measurement

As a result of multipath interference, tracking a low-altitude target always leads to an error which cannot be ignorable. Besides the direct reflection from the target, there are three alternative paths via the sea-surface. Under this circumstance, the conventional measurement of monopulse radar (using the real part of amplitude radio) will not represent the angle between the target and the boresight accurately. In this paper, C2 algorithm is applied to process data from the sum and difference channels in order to measure the elevation angle. In some practical scenarios, C2 algorithm may have an unsatisfied error. The reason of the error in C2 algorithm and the method of reducing the error will be discussed in this paper. The results will show the improvement is feasible and effective in monopulse radar low-altitude measurement.