3D passive location of radar emitters plays an important part in electronic support for military surveillance. The AOA (angle of arrivals) is one popular scheme for passive emitter location. In this paper, a location scheme is proposed based on fusion of AOA measurements from two ESM (electronic support measures) sensors installed on two moving platforms, respectively. Furthermore, ILS (iterative least-squares) is also proposed to fuse AOA measurements from two ESMs. Experimental results show that the location accuracy of the radar emitter can be improved effectively by this AOA fusion algorithm.