Publications related to the GRACE Missions (no abstracts)

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Characterizing the phase-tracking limits of the GRACE follow-on flight laser

Sambridge, Callum S., McKenzie, Kirk, Francis, Samuel P., Sánchez, Jezabel Vilardell, and Woodruff, Chris, 2025. Characterizing the phase-tracking limits of the GRACE follow-on flight laser. Physical Review Applied, 24(1):014015, doi:10.1103/q62l-3684.

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@ARTICLE{2025PhRvP..24a4015S,
       author = {{Sambridge}, Callum S. and {McKenzie}, Kirk and {Francis}, Samuel P. and {S{\'a}nchez}, Jezabel Vilardell and {Woodruff}, Chris},
        title = "{Characterizing the phase-tracking limits of the GRACE follow-on flight laser}",
      journal = {Physical Review Applied},
         year = 2025,
        month = jul,
       volume = {24},
       number = {1},
          eid = {014015},
        pages = {014015},
     abstract = "{The Gravity Recovery and Climate Experiment-Follow On (GRACE-FO) mission
        measures changes in the Earth's gravitational field using
        intersatellite microwave and laser links. The received optical
        power at which these laser links operate robustly constrains
        mission parameters, such as spacecraft separation, optical beam
        divergence angle, and technical noise requirements. This work
        optimizes the phasemeter, a critical component of the link, for
        low-received optical power phase-tracking of the GRACE-FO flight
        spare laser. Experimental measurements and analytical modeling
        demonstrated that interferometric links using the GRACE-FO
        flight spare laser can be tracked down to 200 femtowatts (60 dB
        Hz), ten times lower than the 70-dB-Hz signal strength budgeted
        for the GRACE-FO laser link. Operating at this level affords an
        increase by a factor of 3.16 in the separation, divergence
        angle, or relaxation to technical noise requirements over
        current GRACE-FO design settings.}",
          doi = {10.1103/q62l-3684},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025PhRvP..24a4015S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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