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Demonstration of Time Delay Interferometry and Spacecraft Ranging in a Space-based Gravitational Wave Detector using the UF-LISA Interferometry Simulator

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arxiv 1205.1934 v2 pith:6LVAOUCA submitted 2012-05-09 astro-ph.IM

Shawn J. Mitryk , Josep Sanjuan , Guido Mueller This is my paper
classification astro-ph.IM
keywords interferometrycombinationsdelayslaserlisafrequencygravitational-wavenanosecond
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Space-based gravitational-wave observatories such as the Laser Interferometer Space Antenna (LISA) use time-shifted and time-scaled linear combinations of differential laser-phase beat signals to cancel the otherwise overwhelming laser frequency noise. Nanosecond timing precision is needed to accurately form these Time-Delay Interferometry (TDI) combinations which defines a ~1 meter requirement on the inter-spacecraft ranging capability. The University of Florida Hardware-in-the-loop LISA Interferometry Simulator (UFLIS) has been used to test Time-Delay Interferometry in a configuration which incorporates variable delays, realistic Doppler shifts, and simulated gravitational-wave signals. The TDI 2.0 combinations are exploited to determine the time-changing delays with nanosecond accuracy using a TDI-ranging reference tone. These variable delays are used in forming the TDI combinations to achieve the LISA interferometry sensitivity resulting from 10 orders of magnitude laser frequency noise cancellation.

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Cited by 2 Pith papers

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    Four LISA science objectives are summarized for the European particle physics strategy, covering gravity tests, standard sirens, and TeV-scale stochastic gravitational wave backgrounds.

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