1. Fastar Research Group Dept. Radar and Imaging Systems, Denel Dynamics, Nellmapius Rd, Irene, 0157, Centurion, SA
2. Department of Electrical Eng., University of Cape Town, 7700, Cape Town, SA
3. Dept. of Computer Science, University of Pretoria, Roper Str, 0002, Pretoria, SA
4. School of Computing, University of South Africa, Preller Str 1, 0001, Pretoria, SA