Mon Dec 15, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Yan, Yihao, Wang, Changqing, Müller, Laura, Wegener, Henry, Heinzel, Gerhard, and Müller, Vitali, 2025. Re-analysing the data processing of the K-band ranging system on GRACE Follow-On. Journal of Geodesy, 99(10):80, doi:10.1007/s00190-025-01988-w.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025JGeod..99...80Y,
author = {{Yan}, Yihao and {Wang}, Changqing and {M{\"u}ller}, Laura and {Wegener}, Henry and {Heinzel}, Gerhard and {M{\"u}ller}, Vitali},
title = "{Re-analysing the data processing of the K-band ranging system on GRACE Follow-On}",
journal = {Journal of Geodesy},
keywords = {GRACE Follow-On, Microwave ranging system, Carrier frequency variation, Satellite Center-of-Mass motion, KBR1B v50},
year = 2025,
month = sep,
volume = {99},
number = {10},
eid = {80},
pages = {80},
abstract = "{The K-Band Ranging System (KBR) is the key payload for measuring inter-
satellite distance variations with micrometer accuracy on the
GRACE and GRACE Follow-On (GRACE-FO) missions. Alongside KBR,
GRACE-FO includes a novel and more precise Laser Ranging
Interferometer (LRI). The KBR observations not only support the
gravity field recovery, but also play an irreplaceable role in
estimating the LRI scale factor. Although recent analyses
suggest that the KBR-LRI residuals at low frequencies are mainly
limited by time-tag errors, this study investigates also smaller
contributions in detail. We reprocess the KBR data from Level-1A
to Level-1B in alternative ways, e.g. to study different
approaches for gap-filling of missing phase observations and the
impacts of clock offsets. We find that low-pass filtering the
clock offset improves data quality, and additional smoothing at
day boundaries reduces some jumps at these day-to-day
transitions. In addition, carrier Frequency Variation Correction
is applied in the phase-to-range conversion with amplitudes at a
level close to KBR noise requirements. Other enhancements
include the refinement of the Light Time Correction and the
consideration of satellite center-of-mass motion in the Antenna
Offset Correction. These updates have been incorporated into our
new KBR1B v50 dataset, which is publicly available for the
GRACE-FO period (2018{\textendash}2024). While these changes
have little effect on the Level-2 gravity field maps at the
current level of precision, they do improve the Level-1B KBR
data for GRACE missions and are partially applicable to LRI
processing, which has potential applications for future more
accurate missions.}",
doi = {10.1007/s00190-025-01988-w},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025JGeod..99...80Y},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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