Mr. Mark J. Sirota Profile

Mark J. Sirota

Controls Group Leader at Thirty Meter Telescope

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

The Infrared Imaging Spectrograph (IRIS) for TMT: closed-loop adaptive optics while dithering

Edward Chapin, Jennifer Dunn, David Andersen, Glen Herriot, Dan Kerley, Takashi Nakamoto, Jimmy Johnson, Lianqi Wang, Gelys Trancho, Eric Chisholm, Brent Ellerbroek, Kim Gillies, Yutaka Hayano, James Larkin, Luc Simard, Mark Sirota, Ryuji Suzuki, Robert Weber, Shelley Wright, Kai Zhang

Proceedings Volume 10707, 107071E (2018) https://doi.org/10.1117/12.2312804

KEYWORDS: IRIS Consortium, Telescopes, Adaptive optics, Java, Control systems, Real-time computing, Motion controllers, Error analysis, Observatories, Wavefront sensors

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Proceedings Article | 22 July 2014 Paper

Paper

Preliminary design study of the TMT Telescope structure system: overview

Tomonori Usuda, Yutaka Ezaki, Noboru Kawaguchi, Kazuhiro Nagae, Atsushi Kato, Junji Takaki, Masaki Hirano, Tomoya Hattori, Masaki Tabata, Yasushi Horiuchi, Yusuke Saruta, Satoru Sofuku, Noboru Itoh, Takeharu Oshima, Takashi Takanezawa, Makoto Endo, Junji Inatani, Masanori Iye, Amir Sadjadpour, Mark Sirota, Scott Roberts, Larry Stepp

Proceedings Volume 9145, 91452F (2014) https://doi.org/10.1117/12.2055767

KEYWORDS: Telescopes, Optical instrument design, Computer aided design, Mirrors, Electroluminescence, Control systems design, Control systems, Earthquakes, Safety, Thirty Meter Telescope

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We present an overview of the preliminary design of the Telescope Structure System (STR) of Thirty Meter Telescope (TMT). NAOJ was given responsibility for the TMT STR in early 2012 and engaged Mitsubishi Electric Corporation (MELCO) to take over the preliminary design work. MELCO performed a comprehensive preliminary design study in 2012 and 2013 and the design successfully passed its Preliminary Design Review (PDR) in November 2013 and April 2014. Design optimizations were pursued to better meet the design requirements and improvements were made in the designs of many of the telescope subsystems as follows: 1. 6-legged Top End configuration to support secondary mirror (M2) in order to reduce deformation of the Top End and to keep the same 4% blockage of the full aperture as the previous STR design. 2. “Double Lower Tube” of the elevation (EL) structure to reduce the required stroke of the primary mirror (M1) actuators to compensate the primary mirror cell (M1 Cell) deformation caused during the EL angle change in accordance with the requirements. 3. M1 Segment Handling System (SHS) to be able to make removing and installing 10 Mirror Segment Assemblies per day safely and with ease over M1 area where access of personnel is extremely difficult. This requires semi-automatic sequence operation and a robotic Segment Lifting Fixture (SLF) designed based on the Compliance Control System, developed for controlling industrial robots, with a mechanism to enable precise control within the six degrees of freedom of position control. 4. CO₂ snow cleaning system to clean M1 every few weeks that is similar to the mechanical system that has been used at Subaru Telescope. 5. Seismic isolation and restraint systems with respect to safety; the maximum acceleration allowed for M1, M2, tertiary mirror (M3), LGSF, and science instruments in 1,000 year return period earthquakes are defined in the requirements. The Seismic requirements apply to any EL angle, regardless of the operational status of Hydro Static Bearing (HSB) system and stow lock pins. In order to find a practical solution, design optimization study for seismic risk mitigation was carried out extensively, including the performing of dynamic response analyses of the STR system under the time dependent acceleration profile of seven major earthquakes. The work is now moving to the final design phase from April 2014 for two years.

Proceedings Article | 10 November 2011 Paper

Paper

Control system modeling for the Thirty Meter Telescope primary mirror

Douglas MacMynowski, Peter Thompson, J. Shelton, Lewis Roberts, M. Colavita, Mark Sirota

Proceedings Volume 8336, 83360R (2011) https://doi.org/10.1117/12.914941

KEYWORDS: Sensors, Actuators, Telescopes, Mirrors, Performance modeling, Finite element methods, Servomechanisms, Motion models, Control systems, Thirty Meter Telescope

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Proceedings Article | 5 August 2010 Paper

Paper

Dynamic characterization of a prototype of the Thirty Meter Telescope primary segment assembly

Martin Regehr, Peter Thompson, M. Mark Colavita, James Moore, Mark Sirota, Eric Williams

Proceedings Volume 7733, 77332G (2010) https://doi.org/10.1117/12.858155

KEYWORDS: Actuators, Mirrors, Data modeling, Optical benches, Servomechanisms, Finite element methods, Calibration, Prototyping, Motion models, Thirty Meter Telescope

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Proceedings Article | 5 August 2010 Paper

Paper

Servo design and analysis for the Thirty Meter Telescope primary mirror actuators

Peter Thompson, Douglas MacMynowski, Martin Regehr, M. Mark Colavita, Mark Sirota

Proceedings Volume 7733, 77332F (2010) https://doi.org/10.1117/12.857371

KEYWORDS: Actuators, Mirrors, Ferroelectric materials, Servomechanisms, Telescopes, Control systems, Sensors, Image segmentation, Resistors, Thirty Meter Telescope

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Proceedings Article | 4 August 2010 Paper

Paper

Investigation of Thirty Meter Telescope wavefront maintenance using low-order Shack-Hartmann wavefront sensors to correct for thermally-induced misalignments

Carl Nissly, Byoung-Joon Seo, Mitchell Troy, George Angeli, Myung Cho, Chris Shelton, Norbert Sigrist, Mark Sirota

Proceedings Volume 7738, 77380H (2010) https://doi.org/10.1117/12.857849

KEYWORDS: Telescopes, Wavefronts, Wavefront sensors, Device simulation, Systems modeling, Control systems, Thermal modeling, Image quality, Mirrors, Thirty Meter Telescope

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Proceedings Article | 23 July 2008 Paper

Paper

Advancement of the segment support system for the Thirty Meter Telescope primary mirror

Eric Williams, Curtis Baffes, Terry Mast, Jerry Nelson, Benjamin Platt, R. J. Ponchione, Eric Ponslet, Shahriar Setoodeh, Mark Sirota, Vince Stephens, Larry Stepp, Alan Tubb

Proceedings Volume 7018, 701810 (2008) https://doi.org/10.1117/12.790176

KEYWORDS: Distortion, Mirrors, Monochromatic aberrations, Convolution, Glasses, Telescopes, Interfaces, Thermography, Actuators, Photovoltaics

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Proceedings Article | 14 July 2008 Paper

Paper

Thirty Meter Telescope: observatory software requirements, architecture, and preliminary implementation strategies

David Silva, George Angeli, Corinne Boyer, Mark Sirota, Thang Trinh

Proceedings Volume 7019, 70190X (2008) https://doi.org/10.1117/12.789974

KEYWORDS: Observatories, Software development, Telescopes, Control systems, Telecommunications, Computer architecture, Adaptive optics, Data modeling, Data communications, Thirty Meter Telescope

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Proceedings Article | 10 July 2008 Paper

Paper

Analysis of the TMT mount control system

Peter Thompson, Douglas MacMynowski, Mark Sirota

Proceedings Volume 7012, 70121P (2008) https://doi.org/10.1117/12.790277

KEYWORDS: Telescopes, Computer programming, Sensors, Control systems, Performance modeling, Phase modulation, Finite element methods, Electroluminescence, Astatine, Wavefront sensors

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Proceedings Article | 10 July 2008 Paper

Paper

Advances in edge sensors for the Thirty Meter Telescope primary mirror

Chris Shelton, Terry Mast, Gary Chanan, Jerry Nelson, Lewis Roberts, Mitchell Troy, Mark Sirota, Byoung-Joon Seo, Daniel MacDonald

Proceedings Volume 7012, 701210 (2008) https://doi.org/10.1117/12.790415

KEYWORDS: Sensors, Calibration, Mirrors, Telescopes, Sensor calibration, Image segmentation, Motion models, Temperature metrology, Actuators, Thirty Meter Telescope

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Proceedings Article | 10 July 2008 Paper

Paper

TMT telescope structure system: design and development progress report

Kei Szeto, Scott Roberts, Mike Gedig, Glenn Austin, Christie Lagally, Steven Patrick, Dominic Tsang, Doug MacMynowski, Mark Sirota, Larry Stepp, Peter Thompson

Proceedings Volume 7012, 70122G (2008) https://doi.org/10.1117/12.787002

KEYWORDS: Telescopes, Optical instrument design, Control systems, Structural design, Safety, Control systems design, Finite element methods, Space telescopes, Earthquakes, Thirty Meter Telescope

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Proceedings Article | 10 July 2008 Paper

Paper

Control analysis of the TMT primary segment assembly

Peter Thompson, Douglas MacMynowski, Mark Sirota

Proceedings Volume 7012, 70121N (2008) https://doi.org/10.1117/12.790287

KEYWORDS: Mirrors, Actuators, Control systems, Finite element methods, Sensors, Telescopes, Control systems design, Phase modulation, Mirror structures, Thirty Meter Telescope

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Proceedings Article | 9 July 2008 Paper

Paper

Analysis of TMT primary mirror control-structure interaction

Douglas MacMynowski, Peter Thompson, Mark Sirota

Proceedings Volume 7017, 701715 (2008) https://doi.org/10.1117/12.787003

KEYWORDS: Actuators, Servomechanisms, Mirrors, Telescopes, Control systems, Sensors, Structural dynamics, Feedback control, Optical instrument design, Thirty Meter Telescope

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Proceedings Article | 6 July 2006 Paper

Paper

Development of the primary mirror segment support assemblies for the Thirty Meter Telescope

Eric Ponslet, Dan Blanco, Myung Cho, Terry Mast, Jerry Nelson, R. J. Ponchione, Mark Sirota, Vince Stephens, Larry Stepp, Alan Tubb, Eric Williams

Proceedings Volume 6273, 627319 (2006) https://doi.org/10.1117/12.670604

KEYWORDS: Actuators, Mirrors, Telescopes, Glasses, Monochromatic aberrations, Optical instrument design, Space telescopes, Phase modulation, Error analysis, Thirty Meter Telescope

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Proceedings Article | 6 July 2006 Paper

Paper

Control and support of 4-meter class secondary and tertiary mirrors for the Thirty Meter Telescope

Dan Blanco, Myung Cho, Larry Daggert, Phil Daly, Joe DeVries, Jonathan Elias, Bruce Fitz-Patrick, Ed Hileman, Mark Hunten, Ming Liang, Mark Nickerson, Earl Pearson, Dave Rosin, Mark Sirota, Larry Stepp

Proceedings Volume 6273, 62731A (2006) https://doi.org/10.1117/12.672626

KEYWORDS: Mirrors, Actuators, Telescopes, Active optics, Control systems, Computer programming, Systems modeling, Adaptive optics, Monochromatic aberrations, Thirty Meter Telescope

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Proceedings Article | 27 June 2006 Paper

Paper

Software control of the 3 active surfaces of the Thirty Meter Telescope

P. Daly, R. Marshall, M. Sirota, R. Jared

Proceedings Volume 6274, 62740F (2006) https://doi.org/10.1117/12.669709

KEYWORDS: Control systems, Mirrors, Sensors, Actuators, Telescopes, Instrument modeling, Astronomy, Computer programming, Wavefronts, Thirty Meter Telescope

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Proceedings Article | 27 June 2006 Paper

Paper

The telescope control system supervisory controller for the Thirty Meter Telescope

Robert Marshall, Philip Daly, Mark Sirota

Proceedings Volume 6274, 627402 (2006) https://doi.org/10.1117/12.670059

KEYWORDS: Telescopes, Control systems, Adaptive optics, Telecommunications, Wavefronts, Mirrors, Human-machine interfaces, Computing systems, Observatories, Thirty Meter Telescope

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Proceedings Article | 23 June 2006 Paper

Paper

Design of a prototype primary mirror segment positioning actuator for the Thirty Meter Telescope

Kenneth Lorell, Jean-Noël Aubrun, Robert Clappier, Scott Miller, Mark Sirota

Proceedings Volume 6267, 62672T (2006) https://doi.org/10.1117/12.672917

KEYWORDS: Actuators, Mirrors, Control systems, Telescopes, Prototyping, Electronics, Position sensors, James Webb Space Telescope, Astronomy, Thirty Meter Telescope

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Proceedings Article | 26 May 1998 Paper

Paper

Servo control of the movable stages using PMAC controllers for the W.M. Keck Telescope adaptive optics system

Kevin Ho, Paul Stomski, Mark Sirota, Kevin Tsubota

Proceedings Volume 3351, (1998) https://doi.org/10.1117/12.308803

KEYWORDS: Servomechanisms, Computer programming, Telescopes, Control systems, Adaptive optics, Clocks, Interfaces, Optical benches, Mirrors, Device simulation

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Proceedings Article | 21 March 1997 Paper

Paper

Autoguider servo design and testing of the W. M. Keck Telescope

Mark Sirota, Kevin Ho, John Gathright, Hilton Lewis, William Lupton, Peter Thompson

Proceedings Volume 2871, (1997) https://doi.org/10.1117/12.268983

KEYWORDS: Servomechanisms, Telescopes, Computer programming, Cameras, Systems modeling, Optical instrument design, Mirrors, Performance modeling, Space telescopes, Error analysis

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Proceedings Article | 1 June 1994 Paper

Paper

Pointing and tracking performance of the W.M. Keck Telescope

Hilton Lewis, William Lupton, Mark Sirota, Terry Mast, Jerry Nelson, Patrick Wallace

Proceedings Volume 2199, (1994) https://doi.org/10.1117/12.176182

KEYWORDS: Telescopes, Computer programming, Stars, Sensors, Data modeling, Optical instrument design, Servomechanisms, Cameras, Charge-coupled devices, Optical sensors

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Proceedings Article | 1 June 1994 Paper

Paper

Azimuth and elevation servo performance of the W.M. Keck Telescope

Mark Sirota, Peter Thompson, Henry Jex

Proceedings Volume 2199, (1994) https://doi.org/10.1117/12.176183

KEYWORDS: Telescopes, Servomechanisms, Control systems, Computer programming, Electroluminescence, Error analysis, Mirrors, CCD cameras, Optical instrument design, Performance modeling

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Showing 5 of 22 publications

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