Research
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Clinicians' Approach to Treatment Study
How would YOU treat Veronica?
Researchers at Baylor College of Medicine are looking for mental health clinicians to complete a 15-20 minute survey about clinical decision-making. Any mental health clinician aged 18 or over is eligible to particip...
Project · February 05, 2026
New Results From the 2021 FEEDELIO Experiment - a Focus on Reciprocity
Abstract
The FEEDELIO experiment aims at demonstrating adaptive optics capability to mitigate the atmospheric turbulence channel disturbances in a GEO-Feeder relevant environment. In addition to the bi-directional data acquired in presence of an...
Publication · February 05, 2026
Phase estimation at the point-ahead angle for AO pre-compensated ground to GEO satellite telecoms.
Abstract
We present a new method to estimate the off-axis adaptive optics pre-compensation phase of a ground to GEO satellite telecom link suffering from point-ahead anisoplanatism. The proposed phase estimator relies on the downlink phase and l...
Publication · February 05, 2026
Channel Model of a Ground to Satellite Optical Link Pre-compensated by Adaptive Optics
Abstract
We propose a pseudo-analytical channel model of an adaptive optics pre-compensated ground to geostationary satellite optical link, by exploiting uplink/downlink channel reciprocity. The channel model is validated by end-to-end simulation.
Publication · February 05, 2026
Optimisation of the pre-compensation phase for GEO-feeder optical uplinks
Abstract
We propose a new MMSE method relying on phase and log-amplitude on-axis measurements and statistical priors to estimate the pre-compensation phase at point-ahead angle of a ground to geostationnary satellite telecom link suffering from ...
Publication · February 05, 2026
Two-aperture measurements for GEO-feeder adaptive optics pre-compensation optimization.
Abstract
We present a method to estimate the pre-compensation phase of ground-to-geostationary orbit (GEO) optical links based on downlink phase and log-amplitude measurements from two ground apertures. This method allows us to reduce the point-...
Publication · February 05, 2026
Multi-Aperture Ground Receiver to Enhance Adaptive Optics Corrected GEO-Feeder Uplinks
Abstract
We are interested in this paper to GEO-Feeder optical uplink. We consider a two ground apertures system and propose a phase estimation method at the point-ahead angle for adaptive optics pre-compensated ground to GEO satellite links bas...
Publication · February 05, 2026
Tip tilt and focus estimation based on LGS and downlink joint measurements for ground to GEO satellite optical communication link.
Abstract
Achieving high data rates in GEO Feeder optical uplinks faces challenges due to the fading nature of the channel induced by atmospheric turbulence. Adaptive optics pre-compensation using downlink measurements is a solution to mitigate t...
Publication · February 05, 2026
Atmospheric C n 2 Profile Requirements for GEO-Feeder Uplink AO Optimisation
Abstract
To prepare telecom ground-to-GEO AO optimisation demonstrations, we evaluate the state-of-the-art phase estimator at PAA sensitivity to prior uncertainties, especially the
C
n
2 profile resolution. Four layer profiles are shown to su...
Publication · February 05, 2026
Unlocking ground-to-space optical links capacity with optimised AO precompensation using spatiotemporal measurements and priors
Abstract
To enable future space internet networks, it is needed to communicate at very high data rates between the Earth and satellites (GEO or LEO). Currently, the capacity of these links is drastically reduced due to the optical signal losses ...
Publication · February 05, 2026
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