Mon Oct 13, F. Flechtner
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Vielberg, Kristin, Peter, Heike, Kusche, Jürgen, and Löcher, Anno, 2025. Updated radiation pressure force modeling and validation: case studies for GRACE and Sentinel-6 MF. Journal of Geodesy, 99(10):79, doi:10.1007/s00190-025-02000-1.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025JGeod..99...79V,
author = {{Vielberg}, Kristin and {Peter}, Heike and {Kusche}, J{\"u}rgen and {L{\"o}cher}, Anno},
title = "{Updated radiation pressure force modeling and validation: case studies for GRACE and Sentinel-6 MF}",
journal = {Journal of Geodesy},
keywords = {Satellite force modeling, Radiation pressure, GRACE, Sentinel-6 MF},
year = 2025,
month = sep,
volume = {99},
number = {10},
eid = {79},
pages = {79},
abstract = "{Highly accurate radiation pressure (RP) force modeling is required for
precise orbit determination, gravity field recovery, and
thermosphere density retrieval. For radar altimetry missions,
especially the radial component is important, and validating RP
force models in general is still challenging. In this study, we
focus on the precise modeling and validation of RP forces for
low Earth orbit satellites with given macro-model. We develop a
new transient temperature model for Sentinel-6 MF based on
thermistor measurements to account for transient heat-conductive
re-radiation. The RP force models were applied on Sentinel-6 MF
and GRACE-A for a whole year. The choice of different thermal
re-radiation pressure (TRP) force models was found to impact the
acceleration by up to 20 nm/s2, which is as large as the average
Earth radiation pressure signal in sunlight. We validate RP
force models for both satellites with independent satellite
laser ranging (SLR) data. For GRACE-A, we found that neglecting
TRP modeling is better than using the static model with
instantaneous heat re-radiation, since the RMS of SLR residuals
increased by 24\% when including static TRP. The validation for
Sentinel-6 MF with our in-house processing framework revealed
that the new TRP model decreases the SLR residuals by 1.4\%
compared to neglecting TRP and that amplitudes of empirical
accelerations significantly decrease by up to 38\% on average
compared to applying static re-radiation. An additional
validation according to the Copernicus POD Service standards
confirms the results. Further, we discuss ways to overcome
knowledge gaps in existing RP force models in the future.}",
doi = {10.1007/s00190-025-02000-1},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025JGeod..99...79V},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Oct 13, F. Flechtner