51 research outputs found
Real time phase-slopes calculations by correlations using FPGAs
J. Trujillo Sevilla ; M. R. Valido ; L. F. Rodríguez Ramos ; E. Boemo ; F. Rosa ; J. M. Rodríguez Ramos, “Real time phase-slopes calculations by correlations using FPGAs,” Proc. SPIE 7015, Adaptive Optics Systems, 70153B (July 11, 2008), Norbert Hubin; Claire E. Max; Peter L. Wizinowich
, 7015 (Issue) 70153B, (2008). Copyright © 2008 SPIE Society of Photo‑Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.ELT laser guide star wavefront sensors are planned to handle an expected amount of data to be overwhelmingly large
(1600x1600 pixels at 700 fps). According to the calculations involved, the solutions must consider to run on specialized
hardware as Graphical Processing Units (GPUs) or Field Programmable Gate Arrays (FPGAs), among others.
In the case of a Shack-Hartmann wavefront sensor is finally selected, the wavefront slopes can be computed using
centroid or correlation algorithms. Most of the developments are designed using centroid algorithms, but precision ought
to be taken in account too, and then correlation algorithms are really competitive.
This paper presents an FPGA-based wavefront slope implementation, capable of handling the sensor output stream in a
massively parallel approach, using a correlation algorithm previously tested and compared to the centroid algorithm.
Time processing results are shown, and they demonstrate the ability of the FPGA integer arithmetic in the resolution of
AO problems.
The selected architecture is based in today’s commercially available FPGAs which have a very limited amount of
internal memory. This limits the dimensions used in our implementation, but this also means that there is a lot of margin
to move real-time algorithms from the conventionalThis work has been partially supported by “Programa Nacional de Diseño y Producción Industrial" (Project DPI 2006-
07906) of the “Ministerio de Educación y Ciencia" of the Spanish Government, and by “European Regional
Development Fund" (ERDF)
RBCC-E Triad
Comunicación presentada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop celebrado del 17 al 20 de mayo de 2016 en Ponta Delgada, Azores, Portugal
Brewer-OMI validation: a brief tutorial
Presentación realizada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop, celebrado en Ponta Delgada (Sao Miguel, Azores) del 17 al 20 de mayo de 2016
Brewer-OMI validation
Presentación realizada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop, celebrado en Ponta Delgada (Sao Miguel, Azores) del 17 al 20 de mayo de 2016
Aerosol Optical Depth: configuration
Presentación realizada en: Quadrennial Ozone Symposium, celebrado en Edimburgo del 4 al 9 de septiembre de 2016
AOD measurement and data processing (II)
Presentación realizada en: Quadrennial Ozone Symposium, celebrado en Edimburgo del 4 al 9 de septiembre de 2016
Aerosol Optical Depth
Presentación realizada en: Quadrennial Ozone Symposium, celebrado en Edimburgo del 4 al 9 de septiembre de 2016
Eubrewnet Web
Comunicación presentada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop celebrado del 17 al 20 de mayo de 2016 en Ponta Delgada, Azores, Portugal
Python Processing library update
Comunicación presentada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop celebrado del 17 al 20 de mayo de 2016 en Ponta Delgada, Azores, Portugal
- …