Bernadett Stadler
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View article: High fidelity adaptive mirror simulations with reduced order models
High fidelity adaptive mirror simulations with reduced order models Open
In the design process of large adaptive mirrors numerical simulations represent the first step to evaluate the system design compliance in terms of performance, stability and robustness. For the next generation of Extremely Large Telescope…
View article: On Phase Unwrapping via Digital Wavefront Sensors
On Phase Unwrapping via Digital Wavefront Sensors Open
In this paper, we derive a new class of methods for the classic 2D phase unwrapping problem of recovering a phase function from its wrapped form. For this, we consider the wrapped phase as a wavefront aberration in an optical system, and u…
View article: Singular Value and Frame Decomposition-based Reconstruction for Atmospheric Tomography
Singular Value and Frame Decomposition-based Reconstruction for Atmospheric Tomography Open
Atmospheric tomography, the problem of reconstructing atmospheric turbulence profiles from wavefront sensor measurements, is an integral part of many adaptive optics systems used for enhancing the image quality of ground-based telescopes. …
View article: High fidelity adaptive mirror simulations with reduced order models
High fidelity adaptive mirror simulations with reduced order models Open
In the design process of large adaptive mirrors numerical simulations represent the first step to evaluate the system design compliance in terms of performance, stability and robustness. For the next generation of Extremely Large Telescope…
View article: On some analytic properties of the atmospheric tomography operator: Non-Uniqueness and reconstructability issues
On some analytic properties of the atmospheric tomography operator: Non-Uniqueness and reconstructability issues Open
In this paper, we consider the atmospheric tomography operator, which describes the effect of turbulent atmospheric layers on incoming planar wavefronts. Given wavefronts from different guide stars, measured at a telescope, the inverse pro…
View article: Double axicons to maximize Optical Feeder Links transmission on conventional telescopes
Double axicons to maximize Optical Feeder Links transmission on conventional telescopes Open
In this paper we speak about the double-axicon unit built for the CaNaPy instrument, the LGS-AO backbone of the ESA ALASCA TRL6 facility, to demonstrate Optical Feeder Links for Satellite Communications in 2023 using Laser Guide Star Adapt…
View article: Using PASSATA for the numerical simulations of the CaNaPy LGS-AO monostatic, pre-compensated system
Using PASSATA for the numerical simulations of the CaNaPy LGS-AO monostatic, pre-compensated system Open
This paper relates to the numerical simulations applied to CaNaPy, a monostatic LGS-AO system being now integrated at the ESA OGS 1m telescope. CaNaPy is a demonstrator of LGS-AO systems for visible wavelengths. The primary objective of Ca…
View article: Matrix-free vs. matrix-based real-time control for a MORFEO-like setting
Matrix-free vs. matrix-based real-time control for a MORFEO-like setting Open
The Multiconjugate adaptive Optics Relay For ELT Observations (MORFEO) is one of the key Adaptive Optics (AO) systems on the ELT, aiming for a good wavefront correction over a large field of view. To compensate for the rapidly changing atm…
View article: Reports, data and web presentation of model hierarchies for the use in training courses
Reports, data and web presentation of model hierarchies for the use in training courses Open
Deliverable D5.4 in the ROMSOC project
View article: Performance of an iterative wavelet reconstructor for the Multi-conjugate Adaptive Optics RelaY of ESO's ELT
Performance of an iterative wavelet reconstructor for the Multi-conjugate Adaptive Optics RelaY of ESO's ELT Open
The Multi-conjugate Adaptive Optics RelaY (MAORY) is one of the key Adaptive Optics (AO) systems on the European Southern Observatory's Extremely Large Telescope. MAORY aims to achieve a good wavefront correction over a large field of view…
View article: Real-time computing methods for astronomical adaptive optics
Real-time computing methods for astronomical adaptive optics Open
PhD thesis
View article: An augmented wavelet reconstructor for atmospheric tomography. ETNA - Electronic Transactions on Numerical Analysis
An augmented wavelet reconstructor for atmospheric tomography. ETNA - Electronic Transactions on Numerical Analysis Open
Atmospheric tomography, i.e., the reconstruction of the turbulence profile in the atmosphere, is a challenging task for adaptive optics (AO) systems for the next generation of extremely large telescopes. Within the AO community, the solver…
View article: An augmented wavelet reconstructor for atmospheric tomography
An augmented wavelet reconstructor for atmospheric tomography Open
Atmospheric tomography, i.e. the reconstruction of the turbulence profile in the atmosphere, is a challenging task for adaptive optics (AO) systems of the next generation of extremely large telescopes. Within the community of AO the first …
View article: Real-time implementation of an iterative solver for atmospheric tomography
Real-time implementation of an iterative solver for atmospheric tomography Open
The image quality of the new generation of earthbound Extremely Large Telescopes (ELTs) is heavily influenced by atmospheric turbulences. To compensate these optical distortions a technique called adaptive optics (AO) is used. Many AO syst…
View article: Real-time implementation of an iterative solver for atmospheric\n tomography
Real-time implementation of an iterative solver for atmospheric\n tomography Open
The image quality of the new generation of earthbound Extremely Large\nTelescopes (ELTs) is heavily influenced by atmospheric turbulences. To\ncompensate these optical distortions a technique called adaptive optics (AO) is\nused. Many AO s…
View article: Software-based representation of selected benchmark hierarchies equipped with publically available data
Software-based representation of selected benchmark hierarchies equipped with publically available data Open
Based on the multitude of industrial applications, benchmarks for model hierarchies will be created that will form a basis for the interdisciplinary research and for the training programme. These will be equipped with publically available …
View article: Order Reduction on Dynamic Systems using Machine Learning
Order Reduction on Dynamic Systems using Machine Learning Open
Proceedings of the 139 European Study Group with Industry (139ESGI) in Santiago de Compostela, 9-13th July, 2018
View article: Feasibility of standard and novel solvers in atmospheric tomography for the ELT
Feasibility of standard and novel solvers in atmospheric tomography for the ELT Open
The new generation of ground-based extremely large telescopes require highly efficient algorithms to achieve an excellent image quality in a large eld of view. These systems rely on adaptive optics, where one aims to compensate in real-tim…
View article: Reports about 8 selected benchmark cases of model hierarchies
Reports about 8 selected benchmark cases of model hierarchies Open
Based on the multitude of industrial applications, benchmarks for model hierarchies will be created that will form a basis for the interdisciplinary research and for the training programme. These will be equipped with publically available …