1. Sensor Research and Development Corporation; Orono; Maine; USA
2. Applied Signal Technology, Inc.; Arlington; Virginia; USA
3. Lincoln Laboratory; Massachusetts Institute of Technology; Lexington; Massachusetts; USA
4. Marine Physical Laboratory, Scripps Institution of Oceanography; University of California; San Diego, La Jolla; California; USA
5. Space and Naval Warfare Systems Center; San Diego; California; USA
6. Department of Electrical and Computer Engineering; Duke University; Durham; North Carolina; USA