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Formation RF Sensor

Task Manager

Jeff TienJeff Tien

Jeffrey Tien received his M.S. degree in Electrical Engineering from USC in 1993. He joined the GPS systems group at JPL in 1989 where he worked on hardware design of flight GPS receivers for various space missions. He has served as the Instrument Lead Engineer for the Autonomous Formation Flying sensor on the StarLight Mission for the last two years. His research interest includes high speed signal processing and formation flying sensor technology development.



Team Members

Dr. George Purcell (Formation Flying Sensor Architecture, System Design, & Analysis)

Dr. George Purcell has been a member of the Technical Staff at the Jet Propulsion Laboratory since 1975. His research interests and experience include radio interferometry and its geodetic applications, GPS applications, experimental design, and data analysis. Since 1998 he has been working on the development of formation flying technology for StarLight and its predecessors.

Dr. Lawrence Young (Formation Flying Sensor Architecture, System Design, & Analysis)

Dr. Larry E. Young has developed radiometric technology at Caltech's Jet Propulsion Laboratory since 1978. Specific areas of his group's research include digital GPS receivers, multipath mitigation, sub-nanosecond clock synchronization, and sub-cm formation flying. Larry received a Ph.D. in Nuclear Physics from SUNY at Stony Brook in 1975, and a B.A. in Physics from Johns Hopkins in 1970. He has served on several committees defining future navigation systems, and has been author or co-author of 30 refereed papers, 51 conference proceedings, 10 NASA tech briefs, and 3 GPS-related patents.

Jeff Srinivasan (Signal Acquisition Algorithm)

Jeffrey Srinivasan is the Technical Group Supervisor of the Advanced Radio Metric Instrument Development Group at NASA's Jet Propulsion Laboratory. Mr. Srinivasan's group has developed numerous science-grade GPS Space Flight Instruments, including the Primary Instrument for the GRACE mission, as well as the Autonomous Formation Flyer Instrument for the StarLight and Terrestrial Planet Finder Projects. Mr. Srinivasan received a Bachelor of Arts degree from Harvard College and a Master of Science degree in Electrical Engineering from the University of Southern California.

Tim Rogstad (Software Algorithm)

Tim Rogstad has been with the GPS group at JPL since 1995. He was the Instrument Processing Unit (IPU) Software CogEE on Grace and is currently writing the signal processing software for TPF's Formation Flying Sensor. He has a M.S. degree in Electrical Engineering from Cal Poly, Pomona.

Jacob Gorelik (Testbed Support)

Jacob Gorelik received his B.S. degree in Electronics and Computer Engineering Technology from Cal Poly Pomona in 2002. He joined the GPS systems group at JPL in 2001 where he worked on hardware testing of GPS receivers and the Autonomous Formation Flying sensor.

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