Distinguishing Among Mechanisms That Determine Pi 2 Pulsation Period

Kazue Takahashi, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, Robert L Lysak, University of Minnesota, School of Physics and Astronomy, Minneapolis, MN, United States, Michael Hartinger, Virginia Polytechnic Institute and State University, Bradley Department of Electrical and Computer Engineering, Blacksburg, VA, United States, Craig Kletzing, University of Iowa, Department of Physics and Astronomy, Iowa City, IA, United States, Charles William Smith, University of New Hampshire, Department of Physics and Institute for the Study of Earth, Oceans and Space, Durham, NH, United States and Howard J Singer, National Oceanic and Atmospheric Administration, Space Weather Prediction Center, Boulder, CO, United States