Kepler would have been very glad!" ;-)
Inaugural lecture: "Mathematical algorithms and software for ELT
Univ. Prof. Dr. Ronny Ramlau at
The principal of the Johannes
Kepler University Univ.Prof. Dr. Richard Hagelauer delivered the opening speech.
Univ.Prof. Dr. Erich Peter Klement, dean of faculty, introduced Univ.Prov.Dr.
Ronny Ramlau to the audience.
Univ. Prof.Dr. Ronny Ramlau (Principal
Additional informations about "The man behind the ELT-software"
The project "Mathematical algorithms and software for ELT
adaptive optics" is part of the In-Kind contributions of Austria to the
European Southern Observatory (ESO). The project is carried out jointly
by the Industrial Mathematics Institute of the University of Linz, the
Johann Radon Institute for Computational and Applied Mathematics (RICAM)
Industrial Mathematics Competence Center (IMCC) in Linz.
The aim of the project is the development of mathematical
methods for different types of adaptive optics technology such as
single-conjugate adaptive optics (SCAO), multi-conjugate adaptive optics (MCAO)
and multi-object adaptive optics (MOAO). The ESO maintains one of the world's
biggest telescopes utilizing adaptive optics called the
Very Large Telescope (VLT) on mount Paranal in Atacama desert and is
European Extremely Large Telescope (E-ELT).
Parts of the software are already successfully tested and in use in other
Hopefully the construction of the ELT starts soon ....
Multi conjugate adaptive optics (MCAO)
The fundamental limitation of classical AO methods like SCAO
is the narrow field of view. To overcome this problem the concept of AO
requires further development. The technique called multi-conjugate
adaptive optics (MCAO) utilizes more than one deformable mirror in the
process of correcting the wavefront aberrations. Each mirror is optically
conjugated to an individual distance from the telescope and corrects the
aberrations produced by different layers of atmosphere.
The signals driving the deformable mirrors are obtained from severals WFSs,
each observing its own guide stars. This information is processed to first
reconstruct the 3D structure of the atmospheric turbulence profile and then
estimate the actuator commands. The crucial first step of solving the 3D
profile is called atmospheric tomography and the related mathematical problem
is severely ill-posed. In order to overcome the negative effects of the
ill-posedness, sophisticated methods from the field of inverse problems, such
as regularization, have to be applied. The huge computational task involved
in applying MCAO for ELTs is one of the core challenges in the project.
For more details see:
After the lecture there was a cold buffet and I had the pleasure to talk to
Prof. Ramlau face to face.
Report about the ELT-Worldpremiere in Linz (2010): "A virtual 3D walk
through the ELT"
Here is the ESO report about this event: