Control of Formation-Flying Multi-Element Space Interferometers with Direct Interferometer-Output FeedbackThe long-baseline space interferometer concept involving formation flying of multiple spacecraft holds great promise as future space missions for high-resolution imagery. A major challenge of obtaining high-quality interferometric synthesized images from long-baseline space interferometers is to accurately control these spacecraft and their optics payloads in the specified configuration. Our research focuses on the determination of the optical errors to achieve fine control of long-baseline space interferometers without resorting to additional sensing equipment. We present a suite of estimation tools that can effectively extract from the raw interferometric image relative x/y, piston translational and tip/tilt deviations at the exit pupil aperture. The use of these error estimates in achieving control of the interferometer elements is demonstrated using simulated as well as laboratory-collected interferometric stellar images.
Lu, Hui-Ling (Optimal Synthesis, Inc. Palo Alto, CA, United States)
Cheng, H. L. (Optimal Synthesis, Inc. Palo Alto, CA, United States)
Lyon, Richard G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Carpenter, Kenneth G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
August 24, 2013
September 24, 2007
Publication: Proceedings of the 20th International Symposium on Space Flight Dynamics