The estimation of radio activities location is a main task of radio reconnaissance systems. The performance measures of the estimators of these systems are usually the resolution threshold, bias, and variance of the estimated directions. Recently, a low bias estimator, named D„ is proposed for applications in narrow band incoherent sources environment. In this paper, some attractive features of the Dr in a practical environment of wide band coherent sources are introduced. It also presents a process, based on the Dr for attaining a low resolution threshold with a low level of both bias and variance.