1. School of Electrical and Computer Engineering; Cornell University; Ithaca; New York; USA
2. Geospace Research, Inc.; El Segundo; California; USA
3. Air Force Research Laboratory; Hanscom Air Force Base; Massachusetts; USA
4. National Institute of Information and Communications Technology; Koganei; Japan
5. Department of Electrical and Computer Engineering; University of Alaska Fairbanks; Fairbanks; Alaska; USA