Search Results - "Townson, M J"

FAST: Fourier domain adaptive optics simulation tool for bidirectional ground-space optical links through atmospheric turbulence by Farley, O J D, Townson, M J, Osborn, J

“…Free space optical links between the ground and space may be severely degraded by atmospheric turbulence. Adaptive Optics, a technique allowing partial…”
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Optical turbulence profiling with Stereo-SCIDAR for VLT and ELT by Osborn, J, Wilson, R W, Sarazin, M, Butterley, T, Chacón, A, Derie, F, Farley, O J D, Haubois, X, Laidlaw, D, LeLouarn, M, Masciadri, E, Milli, J, Navarrete, J, Townson, M J

“…ABSTRACT Knowledge of the Earth’s atmospheric optical turbulence is critical for astronomical instrumentation. Not only does it enable performance verification…”
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AOtools: a Python package for adaptive optics modelling and analysis by Townson, M J, Farley, O J D, Orban de Xivry, G, Osborn, J, Reeves, A P

“…AOtools is a Python package that is open-source and aimed at providing tools for adaptive optics users and researchers. We present version 1.0, which contains…”
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Efficient implementation of pseudo open-loop control for adaptive optics on Extremely Large Telescopes by Basden, A G, Jenkins, D, Morris, T J, Osborn, J, Townson, M J

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Improved shift estimates on extended Shack–Hartmann wavefront sensor images by Townson, M. J., Kellerer, A., Saunter, C. D.

“…An important factor which affects performance of solar adaptive optics (AO) systems is the accuracy of tracking an extended object in the wavefront sensor. The…”
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Generating artificial reference images for open loop correlation wavefront sensors by Townson, M J, Love, G D, Saunter, C D

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Turbulence velocity profiling for high sensitivity and vertical-resolution atmospheric characterization with Stereo-SCIDAR by Osborn, J, Butterley, T, Townson, M J, Reeves, A P, Morris, T J, Wilson, R W

“…As telescopes become larger, into the era of ~40 m Extremely Large Telescopes, the high-resolution vertical profile of the optical turbulence strength is…”
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Representative optical turbulence profiles for ESO Paranal by hierarchical clustering by Farley, O J D, Osborn, J, Morris, T, Sarazin, M, Butterley, T, Townson, M J, Jia, P, Wilson, R W

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Simulation and optimisation of an astrophotonic reformatter by Anagnos, Th, Harris, R J, Corrigan, M K, Reeves, A P, Townson, M J, MacLachlan, D G, Thomson, R R, Morris, T J, Schwab, C, Quirrenbach, A

“…ABSTRACT Image slicing is a powerful technique in astronomy. It allows the instrument designer to reduce the slit width of the spectrograph, increasing…”
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Generating Artificial Reference Images for Open Loop Correlation Wavefront Sensors by Townson, M. J, Love, G. D, Saunter, C. D

“…Shack-Hartmann wavefront sensors for both solar and laser guide star adaptive optics (with elongated spots) need to observe extended objects. Correlation…”
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AOtools -- a Python package for adaptive optics modelling and analysis by Townson, M. J, Farley, O. J. D, de Xivry, G. Orban, Osborn, J, Reeves, A. P

“…AOtools is a Python package which is open-source and aimed at providing tools for adaptive optics users and researchers. We present version 1.0 which contains…”
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Models of Dam-Break Flow in R-T Space by Townson, J. M, Al-Salihi, A. H

“…The method of characteristics is applied to numerical integration of the shallow water equations written in r-t coordinates. Instant failure of a dam, between…”
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Representative optical turbulence profiles for ESO Paranal by hierarchical clustering by Farley, O. J. D, Osborn, J, Morris, T, Sarazin, M, Butterley, T, Townson, M. J, Jia, P, Wilson, R. W

“…Knowledge of the optical turbulence profile is important in adaptive optics (AO) systems, particularly tomographic AO systems such as those to be employed by…”
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Improved shift estimates on extended Shack-Hartmann wavefront sensor images by Townson, M. J, Kellerer, A, Saunter, C. D

“…An important factor which affects performance of solar adaptive optics (AO) systems is the accuracy of tracking an extended object in the wavefront sensor. The…”
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Turbulence velocity profiling for high sensitivity and vertical-resolution atmospheric characterization with Stereo-SCIDAR by Osborn, J, Butterley, T, Townson, M. J, Reeves, A. P, Morris, T. J, Wilson, R. W

“…MNRAS 464, 3998-4007, 2017 As telescopes become larger, into the era of ~40 m Extremely Large Telescopes, the high- resolution vertical profile of the optical…”
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Optical turbulence profiling with Stereo-SCIDAR for VLT and ELT by Osborn, J, Wilson, R. W, Sarazin, M, Butterley, T, Chacón, A, Derie, F, Farley, O. J. D, Haubois, X, Laidlaw, D, LeLouarn, M, Masciadri, E, Milli, J, Navarrete, J, Townson, M. J

“…Published in MNRAS, 478, 1, 825-834, 2018 https://academic.oup.com/mnras/article-abstract/478/1/825/4987879 Knowledge of the Earth's atmospheric optical…”
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Simulation and Optimization of an Astrophotonic Reformatter by Anagnos, Th, Harris, R. J, Corrigan, M. K, Reeves, A. P, Townson, M. J, MacLachlan, D. G, Thomson, R. R, Morris, T. J, Schwab, C, Quirrenbach, A

“…Image slicing is a powerful technique in astronomy. It allows the instrument designer to reduce the slit width of the spectrograph, increasing spectral…”
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On-sky demonstration of matched filters for wavefront measurements using ELT-scale elongated laser guide stars by Basden, A. G., Bardou, L., Calia, D. Bonaccini, Buey, T., Centrone, M., Chemla, F., Gach, J. L., Gendron, E., Gratadour, D., Guidolin, I., Jenkins, D. R., Marchetti, E., Morris, T. J., Myers, R. M., Osborn, J., Reeves, A. P., Reyes, M., Rousset, G., Stangalini, M., Townson, M. J., Vidal, F.

“…The performance of adaptive optics systems is partially dependent on the algorithms used within the real‐time control system to compute wavefront slope…”
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On-sky demonstration of matched filters for wavefront measurements using ELT-scale elongated laser guide stars by Basden, A. G, Bardou, L, Calia, D. Bonaccini, Buey, T, Centrone, M, Chemla, F, Gach, J. L, Gendron, E, Gratadour, D, Guidolin, I, Jenkins, D. R, Marchetti, E, Morris, T. J, Myers, R. M, Osborn, J, Reeves, A. P, Reyes, M, Rousset, G, Lombardi, G, Townson, M. J, Vidal, F

“…The performance of adaptive optics systems is partially dependant on the algorithms used within the real-time control system to compute wavefront slope…”
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