Publications related to the GRACE Missions (no abstracts)

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Exploring Thermospheric Disturbance Patterns Through Space-Borne Accelerometer Measurement Errors: A Weighted Accelerometer 1B Dataset of GRACE C

Tzamali, Myrto and Pagiatakis, Spiros, 2024. Exploring Thermospheric Disturbance Patterns Through Space-Borne Accelerometer Measurement Errors: A Weighted Accelerometer 1B Dataset of GRACE C. Geophysical Research Letters, 51(22):2024GL110588, doi:10.1029/2024GL110588.

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@ARTICLE{2024GeoRL..5110588T,
       author = {{Tzamali}, Myrto and {Pagiatakis}, Spiros},
        title = "{Exploring Thermospheric Disturbance Patterns Through Space-Borne Accelerometer Measurement Errors: A Weighted Accelerometer 1B Dataset of GRACE C}",
      journal = {\grl},
     keywords = {GRACE C, accelerometer, weighted datasets, solar terminator, penumbra transitions, thermosphere},
         year = 2024,
        month = nov,
       volume = {51},
       number = {22},
        pages = {2024GL110588},
     abstract = "{Satellite measurements are essential for understanding Earth's complex
        system, yet they often lack a reliable a-priori covariance
        matrix. This study presents a new methodology to enhance the
        reliability of satellite measurements by deriving experimental
        covariance matrices from the original observation. We focus on
        the accelerometer measurements (1A dataset) from the GRACE
        (Gravity Recovery and Climate Experiment) C satellite. Using
        autocorrelation analysis, we create a block-diagonal covariance
        matrix for the 1A dataset. We then apply a low-pass Gaussian
        filter that integrates this covariance matrix into the least
        squares estimation, resulting in a refined 1B dataset that
        minimizes spikes and spurious accelerations while preserving
        measurement error. Our variance analysis uncovers disturbances
        linked to geomagnetic storms and the satellite's transitions
        through Earth's shadow and terminator, with fluctuations notably
        peaking during the equinoxes.}",
          doi = {10.1029/2024GL110588},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2024GeoRL..5110588T},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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