Staff profile

• Adaptive Optics
• Free Space Optical Communications
• Optical Atmospheric Turbulence
• Wavefront Sensing
• Image Processing
• Object Tracking

Conference Paper

• Griffiths, R., Osborn, J., Farley, O., Butterley, T., Townson, M., & Wilson, R. (2023). The 24hSHIMM: a continuous day and night turbulence monitor for optical communications. In H. Hemmati, & B. S. Robinson (Eds.), Proceedings Volume 12413, Free-Space Laser Communications XXXV. https://doi.org/10.1117/12.2648789
• Morris, T., Basden, A., Calcines-Rosario, A., Dohlen, K., Dubbeldam, C., El Hadi, K., …Younger, E. (2018). Phase A AO system design and performance for MOSAIC at the ELT. In L. M. Close, L. Schreiber, & D. Schmidt (Eds.), Proceedings Volume 10703, Adaptive Optics Systems VI. https://doi.org/10.1117/12.2313562
• Townson, M. J., & Saunter, C. D. (2017). Reducing the Field of View in Correlating Wavefront Sensors for Solar Adaptive Optics. In Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017. https://doi.org/10.26698/ao4elt5.0156
• Lombardi, G., Calia, B., Centrone, M., Talavera, M. R. G., Morris, T., Pfrommer, T., …Postigoh, A. D. U. (2017). Photometry and Spectrum measurements of the Laser Guide Star beam emission at Observatorio del Roque de Los Muchachos with the Gran Telescope Canarias. In Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017 (1-7). https://doi.org/10.26698/ao4elt5.0045
• Bardou, L., Gendron, E., Rousset, G., Gratadour, D., Basden, A. G., Bonaccini, D., …Reyes Garcia-Talavera, M. (2017). Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS. In Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017. https://doi.org/10.26698/ao4elt5.0126
• Townson, M. J., Love, G. D., Kellerer, A., & Saunter, C. D. (2016). Correlation wavefront sensing for extended objects. In E. Marchetti, L. M. Close, & J. Véran (Eds.), Proceedings of SPIE. https://doi.org/10.1117/12.2234415
• Townson, M., Kellerer, A., Osborn, J., Butterley, T., Morris, T., & Wilson, R. (2014). Daytime site characterisation of La Palma, and its relation to night-time conditions. In K. . R. Suzanne, I. S. McLean, & H. Takami (Eds.), Ground-based and airborne instrumentation for astronomy V. https://doi.org/10.1117/12.2056451

Doctoral Thesis

• Townson, M. J. (2016). Correlation Wavefront Sensing and Turbulence Profiling for Solar Adaptive Optics. (Thesis). Durham University. Retrieved from https://durham-repository.worktribe.com/output/1647300

Journal Article

• Hartley, K. E., Farley, O. J. D., Townson, M. J., Osborn, J., & Wilson, R. W. (2023). Optical sparse telescope arrays and scintillation noise. Monthly Notices of the Royal Astronomical Society, 526(1), 1235-1245. https://doi.org/10.1093/mnras/stad2835
• Hartley, K. E., Farley, O. J., Townson, M. J., Osborn, J., & Wilson, R. (2023). First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing. Monthly Notices of the Royal Astronomical Society, 520(3), 4134-4146. https://doi.org/10.1093/mnras/stad420
• Griffiths, R., Osborn, J., Farley, O., Butterley, T., Townson, M. J., & Wilson, R. (2023). Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence. Optics Express, 31(4), 6730-6740. https://doi.org/10.1364/oe.479544
• Farley, O., Townson, M., & Osborn, J. (2022). FAST: Fourier domain adaptive optics simulation tool for bidirectional ground-space optical links through atmospheric turbulence. Optics Express, 30(13), 23050-23064. https://doi.org/10.1364/oe.458659
• Osborn, J., Blacketer, L., Townson, M. J., & Farley, O. J. (2022). Astrosat: forecasting satellite transits for optical astronomical observations. Monthly Notices of the Royal Astronomical Society, 509(2), 1848-1852. https://doi.org/10.1093/mnras/stab3003
• Bardou, L., Gendron, E., Rousset, G., Gratadour, D., Basden, A., Bonaccini Calia, D., …Vidal, F. (2021). ELT-scale elongated LGS wavefront sensing: on-sky results. Astronomy & Astrophysics, 649, Article A158. https://doi.org/10.1051/0004-6361/202038330
• Osborn, J., Townson, M., Farley, O., Reeves, A., & Mata Calvo, R. (2021). Adaptive Optics pre-compensated laser uplink to LEO and GEO. Optics Express, 29(4), 6113-6132. https://doi.org/10.1364/oe.413013
• Laidlaw, D. J., Osborn, J., Morris, T. J., Basden, A. G., Gendron, E., Rousset, G., …Wilson, R. W. (2020). Automated wind velocity profiling from adaptive optics telemetry. Monthly Notices of the Royal Astronomical Society, 491(1), 1287-1294. https://doi.org/10.1093/mnras/stz3062
• Townson, M., Farley, O., Orban de Xivry, G., Osborn, J., & Reeves, A. (2019). AOtools - a Python package for adaptive optics modelling and analysis. Optics Express, 27(22), 31316-31329. https://doi.org/10.1364/oe.27.031316
• Basden, A., Jenkins, D., Morris, T., Osborn, J., & Townson, M. (2019). Efficient implementation of pseudo open loop control for adaptive optics on Extremely Large Telescopes. Monthly Notices of the Royal Astronomical Society, 486(2), 1774-1780. https://doi.org/10.1093/mnras/stz918
• Farley, O., Osborn, J., Morris, T., Sarazin, M., Butterley, T., Townson, M., …Wilson, R. (2018). Representative optical turbulence profiles for ESO Paranal by hierarchical clustering. Monthly Notices of the Royal Astronomical Society, 481(3), 4030-4037. https://doi.org/10.1093/mnras/sty2536
• Laidlaw, D. J., Osborn, J., Morris, T. J., Basden, A. G., Beltramo-Martin, O., Butterley, T., …Wilson, R. W. (2018). Optimizing the accuracy and efficiency of optical turbulence profiling using adaptive optics telemetry for extremely large telescopes. Monthly Notices of the Royal Astronomical Society, 483(4), 4341-4353. https://doi.org/10.1093/mnras/sty3285
• Townson, M., Love, G., & Saunter, C. (2018). Generating artificial reference images for open loop correlation wavefront sensors. Monthly Notices of the Royal Astronomical Society, 479(2), 1595-1602. https://doi.org/10.1093/mnras/sty1362
• Osborn, J., Wilson, R., Sarazin, M., Butterley, T., Chacon, A., Derie, F., …Townson, M. (2018). Optical turbulence profiling with Stereo-SCIDAR for VLT and ELT. Monthly Notices of the Royal Astronomical Society, 478(1), 825-834. https://doi.org/10.1093/mnras/sty1070
• Basden, A., Bardou, L., Bonaccini-Calia, D., Buey, T., Centrone, M., Chemla, F., …Vidal, F. (2017). On-sky demonstration of matched filters for wavefront measurements using ELT-scale elongated laser guide stars. Monthly Notices of the Royal Astronomical Society, 466(4), 5003-5010. https://doi.org/10.1093/mnras/stx062
• Osborn, J., Butterley, T., Townson, M., Reeves, A., Morris, T., & Wilson, R. (2017). Turbulence velocity profiling for high sensitivity and vertical-resolution atmospheric characterization with Stereo-SCIDAR. Monthly Notices of the Royal Astronomical Society, 464(4), 3998-4007. https://doi.org/10.1093/mnras/stw2685
• Townson, M., Kellerer, A., & Saunter, C. (2015). Improved shift estimates on extended Shack–Hartmann wavefront sensor images. Monthly Notices of the Royal Astronomical Society, 452(4), 4022-4028. https://doi.org/10.1093/mnras/stv1503
• Townson, M., Kellerer, A., Osborn, J., Butterley, T., Morris, T., & Wilson, R. (2015). Characterising daytime atmospheric conditions on La Palma. Journal of Physics: Conference Series, 595, Article 012035. https://doi.org/10.1088/1742-6596/595/1/012035

Presentation

• Laidlaw, D. J., Osborn, J., Wilson, R. W., Morris, T. J., Butterley, T., Reeves, A. P., …Morel, C. (2016, July). Turbulence profiling for adaptive optics tomographic reconstructors