Abstract

Adaptive Optics (AO) is a technology that permits to measure and mitigate the distortion effects of atmospheric turbulence on optical beams. AO must operate in real-time by controlling thousands of actuators to shape the surface of deformable mirrors deployed on ground-based telescopes to compensate for these distortions. The command vectors that trigger how each individual actuator should act to bend a portion of the mirror are obtained from Matrix-Vector Multiplications (MVM). We identify and leverage the data sparsity structure of these control matrices coming from the MAVIS instruments for the European Southern Observatory's Very Large Telescope. We provide performance evaluation on x86 and accelerator-based systems. We present the impact of tile low-rank (TLR) matrix approximations on time-to-solution for the MVM and assess the produced image quality. We achieve performance improvement up to two orders of magnitude for TLR-MVM compared to regular dense MVM, while maintaining the image quality.

Highlights

  • Our knowledge of the Universe will make a giant leap as the largest ground-based telescopes, with diameters of 25 to 40m [13, 41], see first light before the end of this decade

  • We primarily focus on MAVIS, our Tile Low-Rank (TLR)-Matrix-Vector Multiplications (MVM) implementation can be used across a wide range of Adaptive Optics (AO) instruments [8, 13, 20]

  • We introduce a new TLR-MVM implementation that leverages the data sparsity of the command matrix in a real-time controller, which operates as a replacement to the traditional stateof-the- art dense MVM for computational astronomy in groundbased telescope

Read more

Summary

Introduction

Our knowledge of the Universe will make a giant leap as the largest ground-based telescopes, with diameters of 25 to 40m [13, 41], see first light before the end of this decade. They will provide the angular resolution and collecting area required to detect the first stars and first galaxies as well as faint rocky exoplanets around other stars, possibly harboring life. In its simplest form, an AO system is composed of a Wavefront Sensor (WFS) used to measure atmospheric distortions at a high frame rate, which are compensated with a Deformable Mirror (DM). The sub-system responsible for interpreting wavefront measurements into actual

Objectives
Results
Discussion
Conclusion
Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.