Institution: | 1. HEPL Solar Physics, Stanford University, 445 Via Palou, Stanford, CA 94305-4085, USA;2. Department of Physics, Federal University of Technology, P.O. Box 3220, Akure, Nigeria;3. Laboratory for Solar & Space Physics, NASA Goddard Space Flight Center, Solar Physics Branch, Greenbelt, MD 20771, USA;4. Centro Federal de Educação Tecnológica do Rio Grande do Norte, Natal, Brazil |