Publications related to the GRACE Missions (no abstracts)

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Low-Degree Spherical Harmonic Coefficients for GRACE/GRACE-FO Gravity Field Models From the Fingerprint Approach

Mei, Changlin, Sun, Yu, and Li, Yang, 2025. Low-Degree Spherical Harmonic Coefficients for GRACE/GRACE-FO Gravity Field Models From the Fingerprint Approach. Journal of Geophysical Research (Solid Earth), 130(7):e2024JB029792, doi:10.1029/2024JB029792.

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@ARTICLE{2025JGRB..13029792M,
       author = {{Mei}, Changlin and {Sun}, Yu and {Li}, Yang},
        title = "{Low-Degree Spherical Harmonic Coefficients for GRACE/GRACE-FO Gravity Field Models From the Fingerprint Approach}",
      journal = {Journal of Geophysical Research (Solid Earth)},
         year = 2025,
        month = jul,
       volume = {130},
       number = {7},
          eid = {e2024JB029792},
        pages = {e2024JB029792},
     abstract = "{Low-degree coefficients of time-variable gravity field models from
        Gravity Recovery and Climate Experiment (GRACE) and GRACE-Follow
        On (GRACE-FO) capture large-scale mass changes within the Earth
        system. However, some of these coefficients are either missing
        (e.g., degree-1 coefficients) or poorly determined (e.g.,
        ${C}_{20}$). Such a situation is exacerbated particularly over
        the GRACE-FO period when one of the accelerometers carries
        elevated noise. In this study, we present a framework for
        estimating low-degree coefficients using the fingerprint
        approach. Our results demonstrate that this method can reliably
        estimate multiple coefficients simultaneously, producing
        degree-1, ${C}_{20}$, and ${C}_{30}$ estimates that are
        comparable to the currently recommended solutions, both in
        direct comparisons and in the context of estimating mass changes
        over the Antarctic Ice Sheet. This framework not only provides
        an alternative approach for determining low-degree coefficients
        currently identified as problematic in GRACE/GRACE-FO gravity
        field models, but also shows potential for addressing other
        degraded low-degree coefficients that may emerge during future
        GRACE-FO operations.}",
          doi = {10.1029/2024JB029792},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025JGRB..13029792M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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