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Wavefront tilt feedforward for the formation interferometer testbad (FIT)

Show simple item record Shields, J. F. en_US Liewer, K. en_US Wehmeier, U. en_US 2004-11-09T23:03:12Z 2004-11-09T23:03:12Z 2002-08-22 en_US
dc.identifier.citation SPIE Astronomical Telescopes and Instrumentation Conference en_US
dc.identifier.citation Waikoloa, HI, USA en_US
dc.identifier.clearanceno 02-1994 en_US
dc.description.abstract Separated spacecraft interferometry is a candidate architecture for several future NASA missions. The Formation Interferometer Testbed (FIT) is a ground based testbed dedicated to the validation of this key technology for a formation of two spacecraft. In separated spacecraft interferometry, the residual relative motion of the component spacecraft must be compensated for by articulation of the optical components. In this paper, the design of the FIT interferometer pointing control system is described. This control system is composed of a metrology pointing loop that maintains an optical link between the two spacecraft and two stellar pointing loops for stabilizing the stellar wavefront at both the right and left apertures of the instrument. A novel feedforward algorithm is used to decouple the metrology loop from the left side stellar loop. Experimental results from the testbed are presented that verify this approach and that fully demonstrate the performance of the algorithm. en_US
dc.format.extent 3656670 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other formation flying en_US
dc.title Wavefront tilt feedforward for the formation interferometer testbad (FIT) en_US

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