Mon Oct 13, F. Flechtner
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Sambridge, Callum S., McKenzie, Kirk, Francis, Samuel P., Sánchez, Jezabel Vilardell, and Woodruff, Chris, 2025. Characterizing the phase-tracking limits of the GRACE follow-on flight laser. Physical Review Applied, 24(1):014015, doi:10.1103/q62l-3684.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025PhRvP..24a4015S,
author = {{Sambridge}, Callum S. and {McKenzie}, Kirk and {Francis}, Samuel P. and {S{\'a}nchez}, Jezabel Vilardell and {Woodruff}, Chris},
title = "{Characterizing the phase-tracking limits of the GRACE follow-on flight laser}",
journal = {Physical Review Applied},
year = 2025,
month = jul,
volume = {24},
number = {1},
eid = {014015},
pages = {014015},
abstract = "{The Gravity Recovery and Climate Experiment-Follow On (GRACE-FO) mission
measures changes in the Earth's gravitational field using
intersatellite microwave and laser links. The received optical
power at which these laser links operate robustly constrains
mission parameters, such as spacecraft separation, optical beam
divergence angle, and technical noise requirements. This work
optimizes the phasemeter, a critical component of the link, for
low-received optical power phase-tracking of the GRACE-FO flight
spare laser. Experimental measurements and analytical modeling
demonstrated that interferometric links using the GRACE-FO
flight spare laser can be tracked down to 200 femtowatts (60 dB
Hz), ten times lower than the 70-dB-Hz signal strength budgeted
for the GRACE-FO laser link. Operating at this level affords an
increase by a factor of 3.16 in the separation, divergence
angle, or relaxation to technical noise requirements over
current GRACE-FO design settings.}",
doi = {10.1103/q62l-3684},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025PhRvP..24a4015S},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Oct 13, F. Flechtner