Space Science Division, Naval Research Laboratory : National Research Council Research Associate
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and Stanford Linear Acceleartor Center, Stanford University
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)