1. A beamsteerer for broadband energy source location, comprising: an array of sensors, each of said sensors generating a signal vector d within one of N sectors in a domain of interest; and a beamformer for receiving and multiplying each said signal vector d by a set of N optimal weight vectors W 1 in said domain of interest to generate a plurality of beampatterns in said N sectors, each of said beampatterns being characterized by a null having high angular resolution, and detecting said source at a position (θ,φ) by selecting a maximum steering index (SI) where SI = 1  w H ⁢ d  p