Publications related to the GRACE Missions (no abstracts)

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Advancements in the GRACE and GRACE-FO Gradiometer Mode

Pandit, Nikeet and Pagiatakis, Spiros, 2025. Advancements in the GRACE and GRACE-FO Gradiometer Mode. Earth and Space Science, 12(5):e2024EA004045, doi:10.1029/2024EA004045.

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@ARTICLE{2025ESS...1204045P,
       author = {{Pandit}, Nikeet and {Pagiatakis}, Spiros},
        title = "{Advancements in the GRACE and GRACE-FO Gradiometer Mode}",
      journal = {Earth and Space Science},
     keywords = {gravity gradient, GOCE, GRACE},
         year = 2025,
        month = may,
       volume = {12},
       number = {5},
          eid = {e2024EA004045},
        pages = {e2024EA004045},
     abstract = "{The global gravitational gradient field has not been observed since the
        decommission of GOCE in 2013. Based on the foundational work of
        Peidou and Pagiatakis (2019,
        https://doi.org/10.1029/2018jb016382), we advance the concept of
        GRACE gradiometer mode (GM) for the purpose of using GRACE,
        GRACE-FO and future gravity space missions as ``gradiometer
        missions.'' Certainly, the GRACE missions have never carried on
        board a gradiometer; it is the concept of GM that creates a
        fictitious gradiometer system very similar to GOCE, only the
        GRACE ``gradiometers'' have long and variable baselines, an
        unprecedented paradigm for space-based gravitational gradiometry
        that extends the bandwidth of available GOCE gradient solutions.
        In this contribution, we develop a new configuration for GM that
        views an individual satellite as the ``gradiometer'' by directly
        using Level 1A accelerometer measurements at a 10 Hz sampling
        rate. We apply the new method in geodynamically active regions
        around the globe, and we demonstrate that using GRACE-C as a
        ``gradiometer'' in the single-satellite gradiometer mode (SS-GM)
        produces higher-fidelity gravitational gradient estimates,
        clearly delineating tectonic plate boundaries and subduction
        zones in the Himalayas and North Africa regions, the Aleutian
        trench, the Java trench, and the Peru-Chile trench. Over Canada,
        we see the delineation of the Canadian shield, and the effect of
        glacial isostatic adjustment is apparent. We also observe well-
        known signals resembling terrestrial water storage changes in
        Africa, among others, demonstrating the usefulness of the GM for
        a wide variety of geoscience applications.}",
          doi = {10.1029/2024EA004045},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025E&SS...1204045P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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