Electrical Engineering Department, University of Chile, Santiago, Chile

formerly at: Electrical and Computer Engineering Department and Center for Space Physics, Boston University, Boston, MA, USA

Electrical and Computer Engineering Department and Center for Space Physics, Boston University, Boston, MA, USA

Astronomy Department, Boston University, Boston, MA, USA

Physical Sciences Department, Embry-Riddle Aeronautical University, Daytona Beach, FL, USA

formerly at: Electrical and Computer Engineering Department and Center for Space Physics, Boston University, Boston, MA, USA