1. Surface Optics Corporation, 11555 Rancho Bernardo Road, San Diego, CA, 92127-1441, USA
2. Zel Techologies, LLC and NOAA/ETL, 325 Broadway, Boulder, CO, 80305-3328, USA
3. U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, NC, 27709, USA