Publications related to the GRACE Missions (no abstracts)

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Tone–assisted time delay interferometry on GRACE Follow–On

Francis, Samuel P., Shaddock, Daniel A., Sutton, Andrew J., de Vine, Glenn, Ware, Brent, Spero, Robert E., Klipstein, William M., and McKenzie, Kirk, 2015. Tone–assisted time delay interferometry on GRACE Follow–On. \prd, 92(1):012005, doi:10.1103/PhysRevD.92.012005.

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@ARTICLE{2015PhRvD..92a2005F,
       author = {{Francis}, Samuel P. and {Shaddock}, Daniel A. and {Sutton}, Andrew J. and {de Vine}, Glenn and {Ware}, Brent and {Spero}, Robert E. and {Klipstein}, William M. and {McKenzie}, Kirk},
        title = "{Tone-assisted time delay interferometry on GRACE Follow-On}",
      journal = {\prd},
     keywords = {04.80.Nn, 07.60.Ly, 91.10.-v, 07.87.+v, Gravitational wave detectors and experiments, Interferometers, Geodesy and gravity, Spaceborne and space research instruments apparatus and components},
         year = 2015,
        month = jul,
       volume = {92},
       number = {1},
          eid = {012005},
        pages = {012005},
     abstract = "{We have demonstrated the viability of using the Laser Ranging
        Interferometer on the Gravity Recovery and Climate Experiment
        Follow-On (GRACE-FO) space mission to test key aspects of the
        interspacecraft interferometry proposed for detecting
        gravitational waves. The Laser Ranging Interferometer on GRACE-
        FO will be the first demonstration of interspacecraft
        interferometry. GRACE-FO shares many similarities with proposed
        space-based gravitational wave detectors based on the Laser
        Interferometer Space Antenna (LISA) concept. Given these
        similarities, GRACE-FO provides a unique opportunity to test
        novel interspacecraft interferometry techniques that a LISA-like
        mission will use. The LISA Experience from GRACE-FO Optical
        Payload (LEGOP) is a project developing tests of arm locking and
        time delay interferometry (TDI), two frequency stabilization
        techniques, that could be performed on GRACE-FO. In the proposed
        LEGOP TDI demonstration one GRACE-FO spacecraft will have a
        free-running laser while the laser on the other spacecraft will
        be locked to a cavity. It is proposed that two one-way
        interspacecraft phase measurements will be combined with an
        appropriate delay in order to produce a round-trip, dual one-way
        ranging (DOWR) measurement independent of the frequency noise of
        the free-running laser. This paper describes simulated and
        experimental tests of a tone-assisted TDI ranging (TDIR)
        technique that uses a least-squares fitting algorithm and
        fractional-delay interpolation to find and implement the delays
        needed to form the DOWR TDI combination. The simulation verifies
        tone-assisted TDIR works under GRACE-FO conditions. Using
        simulated GRACE-FO signals the tone-assisted TDIR algorithm
        estimates the time-varying interspacecraft range with a rms
        error of {\ensuremath{\pm}}0.2 m , suppressing the free-running
        laser frequency noise by 8 orders of magnitude. The experimental
        results demonstrate the practicability of the technique,
        measuring the delay at the 6 ns level in the presence of a
        significant displacement signal.}",
          doi = {10.1103/PhysRevD.92.012005},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2015PhRvD..92a2005F},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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