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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