Thu Apr 10, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Zhang, Rui, Xiong, Yongliang, and Xu, Shaoguang, 2025. Phase residuals analysis in kinematic orbit determination of GRACE-FO. Advances in Space Research, 75(2):2048–2061, doi:10.1016/j.asr.2024.11.008.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025AdSpR..75.2048Z,
author = {{Zhang}, Rui and {Xiong}, Yongliang and {Xu}, Shaoguang},
title = "{Phase residuals analysis in kinematic orbit determination of GRACE-FO}",
journal = {Advances in Space Research},
keywords = {Phase residuals, Kinematic orbit determination, Multipath, PCV, Zero-difference},
year = 2025,
month = jan,
volume = {75},
number = {2},
pages = {2048-2061},
abstract = "{The GRACE-FO based scientific research will benefit from the improvement
of the kinematic orbit quality. This study investigated the
errors that could potentially impact the accuracy of orbit
determination and applied error corrections to the observations,
including phase center variation (PCV) and multipath error, with
a specific focus on enhancing the performance of GRACE-FO
kinematic precise orbit determination based on the zero-
difference method. When the observation model for precise orbit
determination is highly consistent with the actual situation,
the phase residuals should only consist of observation noise.
However, the phase residuals encompass both modeled errors and
unmodeled errors, such as PCV and multipath errors. The study
utilized the GPS observation data of the GRACE-FO satellites in
January 2022 to derive the fixed ambiguity solutions based on
the zero-difference ionosphere-free linear combination, thereby
obtaining the phase residuals. Subsequently, the antenna PCV was
estimated based on the residual method, resulting in a
substantial reduction in carrier phase residuals through PCV
correction. A comparison with the reference orbits revealed that
the root mean square (RMS) of the fixed solutions with PCV
correction improved by 2.8 to 4.3 mm in three directions.
Furthermore, the wavelet decomposition was performed on the
phase residuals to extract the multipath errors and reconstruct
the carrier phase observations. The RMS of the kinematic orbits
improved by 4.3 to 5.9 mm with the incorporation of both the PCV
and multipath error corrections. The RMS of the satellite laser
ranging (SLR) residuals of the two GRACE-FO (GRACE-C and
GRACE-D) satellites were 1.43 cm and 1.48 cm, respectively. The
results indicate that these methods have the potential to
enhance the kinematic orbit accuracy of the GRACE-FO satellites,
bringing it closer to the a posteriori scientific orbit
accuracy.}",
doi = {10.1016/j.asr.2024.11.008},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025AdSpR..75.2048Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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GRACE-FO
Thu Apr 10, F. Flechtner