Mon Oct 13, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Yin, Heng, Yan, Yihao, Zhu, Zitong, Wang, ChangQing, Feng, Wei, Huang, Zhiyong, Zhu, Jubo, Gu, Defeng, and Zhong, Min, 2025. A Concise Phase Anomaly Correction Method for GRACE Follow-On Laser Ranging Interferometer Measurements. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 18:13794–13813, doi:10.1109/JSTARS.2025.3571227.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025IJSTA..1813794Y,
author = {{Yin}, Heng and {Yan}, Yihao and {Zhu}, Zitong and {Wang}, ChangQing and {Feng}, Wei and {Huang}, Zhiyong and {Zhu}, Jubo and {Gu}, Defeng and {Zhong}, Min},
title = "{A Concise Phase Anomaly Correction Method for GRACE Follow-On Laser Ranging Interferometer Measurements}",
journal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},
keywords = {Difference method (DFM), GRACE follow-on, laser ranging interferometer (LRI), phase anomaly, time synchronization offset estimation},
year = 2025,
month = jan,
volume = {18},
pages = {13794-13813},
abstract = "{The GRACE-FO satellite's laser ranging interferometer (LRI) measurements
suffer from a significant number of phase anomalies, which can
directly affect the gravity field recovery. To address this
issue, we proposed an improved difference method (ImDFM) for
phase anomaly processing, which enhances the traditional
difference method (DFM) through two improvements: 1) combine the
phase smoothing technique to handle cycle slips (CSs), single
event upsets (SEUs), and mega phase jumps (PJs) which DFM hard
to process; and 2) propose a novel time-tag synchronization
offsets estimation method based on PJs to rectify the accuracy
degradation caused by time-tag synchronization anomalies.
Compared to the mainstream template method, ImDFM offers a
significant advantage in conciseness. We evaluated the accuracy
of ImDFM and residual spike characteristics by comparing the
ImDFM product (S11) with the template-based product (S10) and
the official JPL RL04 product in phase anomaly, LRI1B and
gravity field results. The results show that 1) ImDFM can
process phase anomalies with an accuracy better than 600 and
the residual spikes mainly affect frequency band above 2 Hz; 2)
the accuracy of estimated time-tag synchronization offset is
better than 4 s, which can effectively correct the loss of
accuracy; 3) the residual spikes in S11 are below 7 nm/s, which
does not affect the accuracy of gravity field recovery. The RL04
is still affected by phase anomalies, resulting in relatively
higher noise above degree 30. In summary, the ImDFM proposed in
this article provides a high precision and concise approach for
processing phase anomalies.}",
doi = {10.1109/JSTARS.2025.3571227},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025IJSTA..1813794Y},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Oct 13, F. Flechtner