1. National Insitute for Space Research -INPE Associated Plasma Laboratory -COPDT,Sao Jose dos Campos,Brazil
2. Federal University of Sao Paulo-UNIFESP Instutite of Science and Technology -ICT,Sao Jose dos Campos,Brazil
3. University of New Mexico - UNM,Eletrical and Computer Engineering – ECE Dept,Albuquerque,USA