1. National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, USA
2. Department of Engineering Science and Mechanics, Pennsylvania State University, 212 EES Bldg., University Park, Pennsylvania 16802, USA
3. Space Vehicles Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117-5776, USA
4. Sandia National Laboratories, Albuquerque, New Mexico 87185-1322, USA
5. Directed Energy Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117-5776, USA