Dr. Gregory S. Agnes Profile

Dr. Gregory S. Agnes

Senior Engineer at Jet Propulsion Lab

SPIE Involvement:

Author

Publications (18)

Proceedings Article | 12 March 2024 Presentation + Paper

Presentation + Paper

Deep space optical communications technology demonstration

Abhijit Biswas, Meera Srinivasan, Kenneth Andrews, Erik Alerstam, Angel Velasco, Malcolm Wright, Joseph Kovalik, Brett Douglas, Jason Allmaras, Vincent Van Rhein, Emma Wollman, Ryan Rogalin, Sean Meenehan, David Zhu, Dylan Conway, Oscar Alvarez-Salazar, Christopher Pong, Herrick Chang, Marcus Wilkerson, Edwin Grigorian, Nathaniel Richard, Daniel Cho, Yuri Beregovski, William Buehlman, Luke Stewart, Mark Brewer, Christine Chen, Vachik Garkanian, Gerardo Ortiz, Daniel Macdonald, Sarah Haque, Matthew Shaw, Christopher Leffler, Greg Agnes, Joel Johnson, Arthur Na-Nakornpanom, Rogeliio Rosas, Jason Mumolo, Oliver Lay, Roger O'Brient, Marcum Martz, Gregory Miles, Kitt Matthews, Hernan Erlig, Dorothy Lewis, Anthony Mittskus, Serge Dubovitsky, William Klipstein

Proceedings Volume 12877, 1287706 (2024) https://doi.org/10.1117/12.3001750

KEYWORDS: Space operations, Telescopes, Signal processing, Receivers, Transmitters, Laser safety, Interfaces, Sensors, Deep space optical communications, Actuators

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SPIE Journal Paper | 4 June 2021 Open Access

Open Access

Starshade Rendezvous: exoplanet orbit constraints from multi-epoch direct imaging

Andrew Romero-Wolf, Geoffrey Bryden, Greg Agnes, Jonathan Arenberg, Samuel Case Bradford, Simone D'Amico, John Debes, Matt Greenhouse, Renyu Hu, Steve Matousek, Jason Rhodes, John Ziemer

JATIS, Vol. 7, Issue 02, 021219, (June 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.2.021219

KEYWORDS: Planets, Stars, Exoplanets, Imaging systems, Signal to noise ratio, Observatories, Telescopes, Target detection, Space telescopes, Monte Carlo methods

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SPIE Journal Paper | 9 January 2021 Open Access

Open Access

Starshade rendezvous: exoplanet sensitivity and observing strategy

Andrew Romero-Wolf, Geoffrey Bryden, Sara Seager, N. Jeremy Kasdin, Jeff Booth, Matt Greenhouse, Doug Lisman, Bruce Macintosh, Stuart Shaklan, Melissa Vess, Steve Warwick, David Webb, John Ziemer, Andrew Gray, Michael Hughes, Greg Agnes, Jonathan Arenberg, S. Case Bradford, Michael Fong, Jennifer Gregory, Steve Matousek, Jason Rhodes, Phil Willems, Simone D'Amico, John Debes, Shawn Domagal-Goldman, Sergi Hildebrandt, Renyu Hu, Alina Kiessling, Nikole Lewis, Maxime Rizzo, Aki Roberge, Tyler Robinson, Leslie Rogers, Dmitry Savransky, Chris Stark

JATIS, Vol. 7, Issue 02, 021210, (January 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.2.021210

KEYWORDS: Planets, Exoplanets, Stars, Telescopes, Signal to noise ratio, Spectroscopy, Target detection, Observatories, Sensors, Point spread functions

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Proceedings Article | 7 October 2013 Paper

Paper

Multiphysics modeling and uncertainty quantification for an active composite reflector

Lee Peterson, S. Bradford, John Schiermeier, Gregory Agnes, Scott Basinger

Proceedings Volume 8840, 88400F (2013) https://doi.org/10.1117/12.2028892

KEYWORDS: Composites, Wavefronts, Error analysis, Control systems, Performance modeling, Mechanics, Space operations, Actuators, Tolerancing, Computer simulations

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Proceedings Article | 24 September 2004 Paper

Paper

The DART cylindrical infrared 1-meter membrane reflector

Rhonda Morgan, Greg Agnes, Dan Barber, Jennifer Dooley, Mark Dragovan, Al Hatheway, Marty Marcin

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.562451

KEYWORDS: Reflectors, Profilometers, Infrared radiation, Space telescopes, Copper, Interferometers, Telescopes, Metrology, Mirrors, Reflector telescopes

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Proceedings Article | 27 June 2002 Paper

Paper

Beam-type modeling of adaptive inflatable tubes

Gregory Agnes

Proceedings Volume 4697, (2002) https://doi.org/10.1117/12.472654

KEYWORDS: Beam analyzers, Satellites, Actuators, Optical spheres, Analytical research, Defense and security, Data modeling, Space operations, Microelectronics, Weapons

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Proceedings Article | 27 June 2002 Paper

Paper

Vibration suppression of a rotationally periodic structure using an adaptive/PPF control law

Mark Keller, Gregory Agnes

Proceedings Volume 4697, (2002) https://doi.org/10.1117/12.472657

KEYWORDS: Adaptive control, Control systems, Actuators, Francium, Matrices, Vibration control, Feedback control, Analytical research, Defense and security, Aluminum

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Proceedings Article | 16 August 2001 Paper

Paper

Modeling piezoceramic twist actuation in a single-cell anisotropic torque box

Peter Cseke, Gregory Agnes

Proceedings Volume 4327, (2001) https://doi.org/10.1117/12.436542

KEYWORDS: Ferroelectric materials, Composites, Actuators, Chemical elements, Skin, Adaptive control, Aerodynamics, Finite element methods, Defense and security, Differential equations

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Proceedings Article | 16 August 2001 Paper

Paper

Optical metrology of adaptive membrane mirrors

John Wagner, Gregory Agnes

Proceedings Volume 4327, (2001) https://doi.org/10.1117/12.436532

KEYWORDS: Mirrors, Ferroelectric polymers, Imaging systems, Monochromatic aberrations, Epoxies, Adaptive optics, Aluminum, Wavefronts, Etching, Wavefront sensors

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Proceedings Article | 2 July 2001 Paper

Paper

Adaptive control for payload launch vibration isolation

Julian Jarosh, Gregory Agnes, Gregory Karahalis

Proceedings Volume 4331, (2001) https://doi.org/10.1117/12.432700

KEYWORDS: Optical isolators, Vibration isolation, Adaptive control, Satellites, Magnesium, Passive isolation, Matrices, Rockets, Space operations, Active isolation

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Proceedings Article | 22 June 2000 Paper

Paper

Piezoelectric excitation of inflatable space structures for modal testing

Gregory Agnes, James Rogers

Proceedings Volume 3985, (2000) https://doi.org/10.1117/12.388883

KEYWORDS: Ferroelectric polymers, Finite element methods, Aerospace engineering, Reflectors, Solar energy, Polymers, Radar, Antennas, Space operations, Electrodynamics

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Proceedings Article | 9 July 1999 Paper

Paper

Preliminary analysis of hybrid launch isolation for spacecraft

Gregory Karahalis, Gregory Agnes

Proceedings Volume 3674, (1999) https://doi.org/10.1117/12.351573

KEYWORDS: Optical isolators, Satellites, Vibration isolation, Magnesium, Space operations, Simulink, Passive isolation, Analytical research, Systems modeling, Control systems

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Proceedings Article | 2 June 1999 Paper

Paper

Piezoelectric coupling of bladed-disk assemblies

Gregory Agnes

Proceedings Volume 3672, (1999) https://doi.org/10.1117/12.349772

KEYWORDS: Statistical analysis, Motion models, Aerodynamics, Electrodes, Manufacturing, Analytical research, Standards development, MATLAB, Astronomical engineering, Electronic design automation

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Proceedings Article | 1 May 1996 Paper

Paper

Nonlinear piezoelectric vibration absorbers

Gregory Agnes, Daniel Inman

Proceedings Volume 2720, (1996) https://doi.org/10.1117/12.239092

KEYWORDS: Chemical elements, Analytical research, Electrodes, Piezoelectric effects, Sun, Feedback control, Complex systems, Numerical simulations, Standards development, Capacitance

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Proceedings Article | 12 May 1995 Paper

Paper

Active smart material system for buffet load alleviation

Kenneth Lazarus, Erik Saarmaa, Gregory Agnes

Proceedings Volume 2447, (1995) https://doi.org/10.1117/12.209331

KEYWORDS: Actuators, Aerodynamics, Control systems, Smart materials, Sensors, Data modeling, Control systems design, Skin, Mathematical modeling, Matrices

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Proceedings Article | 5 May 1995 Paper

Paper

Single-element modeling of multilayer constrained-layer damping treatments

Gregory Agnes

Proceedings Volume 2445, (1995) https://doi.org/10.1117/12.208900

KEYWORDS: Chemical elements, Composites, Finite element methods, Performance modeling, Kinematics, Optimization (mathematics), Temperature metrology, Solids, Differential equations, Partial differential equations

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Proceedings Article | 1 May 1994 Paper

Paper

Active/passive piezoelectric vibration suppression

Gregory Agnes

Proceedings Volume 2193, (1994) https://doi.org/10.1117/12.174112

KEYWORDS: Actuators, Electrodes, Capacitors, Instrument modeling, Ferroelectric materials, Solids, Data modeling, Control systems, Resistance, Chlorine

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Proceedings Article | 8 September 1993 Paper

Paper

Vibration attenuation of aircraft structures utilizing active materials

Gregory Agnes, Stephen Whitehouse, John Mackaman

Proceedings Volume 1917, (1993) https://doi.org/10.1117/12.152774

KEYWORDS: Smart structures, Signal attenuation, Intelligence systems, Active vibration control, Sensors, Aircraft structures, Vibration control, Actuators, Control systems, Acoustics

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Showing 5 of 18 publications

Proceedings Volume Editor (2)

SPIE Conference Volume | 31 July 2003

Smart Structures and Materials 2003: Damping and Isolation

SPIE Conference Volume | 27 June 2002

Smart Structures and Materials 2002: Damping and Isolation

Conference Committee Involvement (20)

Active and Passive Smart Structures and Integrated Systems X

21 March 2016 | Las Vegas, Nevada, United States

Active and Passive Smart Structures and Integrated Systems IX

9 March 2015 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems VIII

10 March 2014 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems VII

10 March 2013 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems VI

12 March 2012 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems V

7 March 2011 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems IV

8 March 2010 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems III

9 March 2009 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems II

10 March 2008 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems

19 March 2007 | San Diego, California, United States

Smart Structures and Integrated Systems

27 February 2006 | San Diego, California, United States

Damping and Isolation

27 February 2006 | San Diego, California, United States

Smart Structures and Integrated Systems

7 March 2005 | San Diego, California, United States

Damping and Isolation

7 March 2005 | San Diego, California, United States

Space Systems Optomechanics and Dynamics

5 August 2004 | Denver, Colorado, United States

Damping and Isolation

15 March 2004 | San Diego, CA, United States

Smart Structures and Integrated Systems

15 March 2004 | San Diego, CA, United States

Smart Structures and Integrated Systems

3 March 2003 | San Diego, California, United States

Damping and Isolation

3 March 2003 | San Diego, California, United States

Damping and Isolation

18 March 2002 | San Diego, California, United States

Showing 5 of 20 Conference Committees

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