• Radar Systems Certificate
• Radar Signal Processing & Techniques Certificate

Byron Keel, a GTRI/SEAL senior research engineer, is the head of the Signal Processing Branch of the Radar Systems Division. With more than 16 years of experience in radar system analysis, waveform design, and signal processing, Keel's research efforts include the design and analysis of wideband, pulse compression waveforms.

Mark Mitchell, a Georgia Tech Research Institute Sensors and Electromagnetic Applications Laboratory senior research engineer, has 15 years of experience in phased-array antennas, with particular emphasis in solid state array architectures and technology, error effects in wideband adaptive digital beamforming, and low-cost arrays.

Samuel O. Piper, a GTRI/SEAL principal research engineer and chief of the Radar Systems Division, has performed radar systems engineering and analysis for ground-based, airborne, and space-based radar systems for more than 35 years, including a variety of applications such as surveillance, airborne intercept, missile seekers, altimeters, missile warning radars, and terrain mapping systems.

James A. Saffold, president and principal investigator for Research Network Inc. and senior research engineer at Georgia Tech Research Institute, has performed technical research into numerous Department of Defense programs related to munitions sensors. He earned is B.S.E.E. from Auburn University and has completed graduate students at the University of Alabama-Huntsville and Georgia Institute of Technology.

James A. Scheer, a principal research engineer in the Sensors and Electromagnetic Applications Laboratory at Georgia Tech Research Institute, has more than 30 years of experience in the design and development of radar systems. He is researching radar systems design and signal processing techniques and is the coauthor of the second edition of Principles of Modern Radar (SciTech Publishing Inc., 2009).

Gregory Showman senior research engineer in Georgia Tech Research Institute's Sensors and Electromagnetic Applications Laboratory, has experience in advanced image formation algorithms for ultrawideband, wide-angle SAR, highprecision turntable inverse SAR techniques, and polarimetric SAR calibration. He researches the development of imaging techniques appropriate for near-field ISAR measurements and polarimetric calibration procedures for UWBWA SAR, and coherent electronic attack and electronic protection techniques for synthetic aperture imaging systems and space-time adaptive radar.

Thomas "T.L." Spangler, a Georgia Tech Research Institute senior research engineer, has 22 years of experience in RF engineering disciplines including surveillance receivers, radar warning receivers, frequency synthesizers, electronic-attack hardware development, and EA system testing. His research focuses on development and field testing of coherent and multiple emitter EA utilizing DRFM technology.

Tracy V. Wallace, a Georgia Tech Research Institute senior research engineer and chief of the Air and Missile Defense Division of the Sensors and Electromagnetics Applications Laboratory, has designed and built numerous instrumentation radar transmitters and worked extensively in the field of active phased-array radars. He has supported numerous system developments such as THAAD, GBR-P, the ground-based X-band radar, naval X-band arrays, and advanced radar technology for the Missile Defense Agency. His research interests include transmit/receive modules, radar power systems, transmitter/receiver hardware architectures, and low-power density, low-cost phased-array architectures.

Thomas "T.L." Spangler
404-407-7749
tl.spangler@gtri.gatech.edu