Mon Aug 24, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Zhang, Jiahui, Tu, Rui, You, Wei, and Zhang, Pengfei, 2026. Performance assessment of multiple LRI1B products for GRACE–FO time–variable gravity field recovery. Advances in Space Research, 78(3):2154–2167, doi:10.1016/j.asr.2026.05.030.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2026AdSpR..78.2154Z,
author = {{Zhang}, Jiahui and {Tu}, Rui and {You}, Wei and {Zhang}, Pengfei},
title = "{Performance assessment of multiple LRI1B products for GRACE-FO time-variable gravity field recovery}",
journal = {Advances in Space Research},
keywords = {LRI, GRACE-FO, Time-variable gravity field, Post-fit residuals},
year = 2026,
month = aug,
volume = {78},
number = {3},
pages = {2154-2167},
abstract = "{The Gravity Recovery and Climate Experiment Follow-on (GRACE-FO)
satellites carry a novel technology demonstration instrument,
the laser ranging interferometer (LRI), parallel to the
microwave interferometer (MWI) for inter satellite ranging. As
critical geometric observations for capturing the Earth gravity
field variation, the quality of monthly gravity field solutions
and the characterization of residual sub-monthly signals are
significantly influenced by the performance of the LRI Level-1B
(LRI1B) data products. Currently, multiple versions of LRI1B
products are independently processed and released by the Albert
Einstein Institute (AEI), the Huazhong University of Science and
Technology (HUST), the Jet Propulsion Laboratory (JPL), and the
Sun Yat-sen University (SYSU). Here, we examine the performance
of multiple LRI1B datasets on GRACE-FO time-variable gravity
field recovery through data cross comparison, monthly LRI-based
gravity solutions, and post-fit residuals from January 2019 to
June 2023. All LRI1B data products maintain high data
availability of {\ensuremath{\sim}}85\%. Direct cross
comparisons reveal that the JPL v04 product presents
systematically higher noise within the high frequency band
exceeding 0.1 Hz. As for monthly gravity field solutions,
spectral and geospatial analyses demonstrate that all four
gravity solutions are consistent with GRACE-FO Science Data
System (SDS) products, achieving comparable noise levels with an
average open ocean root mean square of 3.06 cm and signal
recovery correlations of {\ensuremath{\sim}}0.99 for annual mass
variations. However, significant divergences are identified in
the post-fit range rate and range acceleration residuals. With
the low frequency component excluded, the JPL solution exhibits
a noise floor of 4 {\texttimes} 10$^{{\ensuremath{-}}10}$
m/s$^{2}$ for range acceleration residuals, whereas the AEI,
HUST, and SYSU solutions maintain noise levels below 2
{\texttimes} 10$^{{\ensuremath{-}}10}$ m/s$^{2}$. While the high
frequency noise does not degrade monthly solutions, it presents
a potential limitation for the extraction of subtle sub-monthly
geophysical signals. These findings provide a scientific basis
for data product selection and laser data processing strategies
for the future mission.}",
doi = {10.1016/j.asr.2026.05.030},
adsurl = {https://ui.adsabs.harvard.edu/abs/2026AdSpR..78.2154Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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