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Ranging -- MSTAR

Task Manager

Dr. Serge Dubovitsky Serge Dubovitsky

Dr. Dubovitsky is also a principal investigator on a MSTAR Sensor task. He is a member of the Active Optical Sensors Technology Group at JPL and over the past decade has been actively involved in conceptual development, design and implementation of metrology sensors and observation systems for space-based applications. At JPL he is also the Chief Architect for the Terrestrial Planet Finder (TPF) Interferometer project in charge of developing and engineering interferometer architectures that will enable detection of habitable planets around other stars. The MSTAR task has demonstrated a sensor concept that makes possible an ultra-high dynamic range metrology system with nanometer accuracy and multi-kilometer ambiguity range. Dr. Dubovitsky invented the Heterodyne Interferometer with Carrier Phase Modulation, a new technology that enables measurement of nanometer-scale displacements at a kilometer-scale spacecraft separations. Dr. Dubovitsky has also participated in the stabilization and linewidth-narrowing of semiconductor lasers for terahertz frequency generation applicable to Earth-observing and astrophysical emission spectroscopy and has demonstrated a two-color "absolute" metrology system.

Team Members

Dr. Oliver P. Lay

Oliver Lay obtained his undergraduate degree in Physics (1991), followed by a PhD in Radio Astronomy (1994), both at Cambridge University. His thesis project involved linking the James Clerk Maxwell Telescope and the Caltech Submillimeter Observatory to form the first submillimeter-wave interferometer. During postdocs at Caltech and Berkeley, his subsequent research interests included star formation and protoplanetary disks, and the propagation of signals through the atmosphere, in addition to interferometry. He came to JPL in 1998, and became the Interferometer Architect and Project Scientist for the StarLight formation-flying interferometry mission. Now part of the Terrestrial Planet Finder design team, he is also interested in optical metrology.

Robert Peters

Robert Peters received a B.S. in physics from Central Washington University and a M.S. in physics from Montana State University. His graduate work involved using an inhomogeneously broadened material as a laser frequency reference and programmable true time delay for phased array antenna applications. His work at JPL has included laser metrology projects and laser frequency stabilization.

Dr. Karl C. Liebe

Dr. Carl Christian Liebe received the M.S.E.E. degree in 1991 and the Ph.D. degree in 1994 from the Department of Electro physics, Technical University of Denmark. Since 1997, he has been an employee at the Jet Propulsion Laboratory, California Institute of Technology. Currently, he is a senior member of the technical staff in the Interferometry & Large Optical Systems Section. His research activities have included GNC sensors, camera systems and metrology systems. He has published more than 40 papers.

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