Ms. Sarah Gajadhar Profile

Sarah Gajadhar

Director at SG Consulting Inc

SPIE Involvement:

Author

Publications (11)

Proceedings Article | 25 August 2022 Presentation + Paper

TMT systems engineering evolution in the last decade

Gelys Trancho, George Angeli, Josh Church, Jamie Dodge, Bart Fordham, Sarah Gajadhar, Nancy Han, Kayla Hardie, Doug McMartin, John Miles, Scott Roberts, John Rogers, Fernando Santoro, Hugh Thompson, Konstantinos Vogiatzis

Proceedings Volume 12187, 121870L (2022) https://doi.org/10.1117/12.2631603

KEYWORDS: Systems engineering, Interfaces, Computer aided design, Observatories, Systems modeling, Standards development, Safety, Reliability, Databases, Control systems

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Proceedings Article | 25 August 2022 Presentation + Paper

Key performance parameter thresholds for the Giant Magellan Telescope

Breann Sitarski, George Angeli, Sarah Gajadhar, Rodolphe Conan, Antonin Bouchez, Robert Goodrich, Brian Walls

Proceedings Volume 12187, 121870J (2022) https://doi.org/10.1117/12.2630324

KEYWORDS: Observatories, Mirrors, Image quality, Telescopes, Error analysis, Point spread functions, Integrated modeling, Image segmentation, Wavefronts, Monte Carlo methods

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SPIE Journal Paper | 15 April 2022

Maintenance concept for the Extremely Large Telescopes

Marcos Antonio Ortega, Kayla Hardie, Sarah Gajadhar, Robert Goodrich

JATIS, Vol. 8, Issue 02, 021506, (April 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.021506

KEYWORDS: Observatories, Telescopes, Large telescopes, Reliability, Thirty Meter Telescope, Systems modeling, Computing systems, Optical instrument design, Curium, Solid modeling

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Proceedings Article | 13 December 2020 Paper

Key performance parameter based systems engineering for the Giant Magellan Telescope through construction and commissioning

George Angeli, Breann Sitarski, Rodolphe Conan, Brian Walls, Antonin Bouchez, Robert Goodrich, Rafael Millan-Gabet, Sarah Gajadhar

Proceedings Volume 11450, 114500H (2020) https://doi.org/10.1117/12.2562543

KEYWORDS: Systems engineering, Telescopes, Image quality, Observatories, Complex systems, Target acquisition, Integrated modeling, Performance modeling, Systems modeling

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Proceedings Article | 10 July 2018 Presentation + Paper

Understanding the risk of unattended nighttime operations at W. M. Keck Observatory

Sarah Gajadhar, Carolyn Jordan, Paul Stomski

Proceedings Volume 10705, 1070506 (2018) https://doi.org/10.1117/12.2311418

KEYWORDS: Observatories, Telescopes, Failure analysis, Keck Observatory, Reliability, Sensors, Cameras, Domes, Clouds

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Proceedings Article | 10 July 2018 Paper

Integrating project management and systems engineering to transition to remote operations

Sarah Gajadhar, Paul Stomski

Proceedings Volume 10705, 107051B (2018) https://doi.org/10.1117/12.2311421

KEYWORDS: Observatories, Systems engineering, Gemini Observatory, Reliability, Keck Observatory, Telescopes, Systems modeling, Document management, Process engineering, Visual process modeling

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Proceedings Article | 15 August 2016 Paper

A feasibility study for conducting unattended night-time operations at WMKO

Paul Stomski, Sarah Gajadhar, Scott Dahm, Carolyn Jordan, Tom Nordin

Proceedings Volume 9911, 99111F (2016) https://doi.org/10.1117/12.2230831

KEYWORDS: Human-machine interfaces, Safety, Control systems, Observatories, Telescopes, Computing systems, Camera shutters, Imaging systems, Reliability, Sensors

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Proceedings Article | 17 September 2012 Paper

Canada-France-Hawaii Telescope image quality improvement initiative: thermal assay of the observing environment

Karun Thanjavur, Kevin Ho, Sarah Gajadhar, Marc Baril, Tom Benedict, Steve Bauman, Derrick Salmon

Proceedings Volume 8444, 84441S (2012) https://doi.org/10.1117/12.926916

KEYWORDS: Skin, Temperature metrology, Domes, Observatories, Gemini Observatory, Telescopes, Supercooling, Thermography, Heat flux, Cameras

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Proceedings Article | 5 August 2010 Paper

Application of systems engineering concepts in the Canada-France-Hawaii Telescope Observatory automation project

Sarah Gajadhar, Todd Burdullis, William Cruise, Tom Vermeulen

Proceedings Volume 7738, 773816 (2010) https://doi.org/10.1117/12.856477

KEYWORDS: Control systems, Observatories, Telescopes, Mirrors, Camera shutters, Domes, Systems engineering, Video, Photonic integrated circuits, Cameras

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Proceedings Article | 23 July 2008 Paper

Increasing observing efficiency by modeling telescope focus positions

Sarah Gajadhar, Derrick Salmon, Gregory Barrick

Proceedings Volume 7018, 70183W (2008) https://doi.org/10.1117/12.787667

KEYWORDS: Telescopes, Data modeling, Image quality, Temperature metrology, Instrument modeling, Model-based design, Eye, Eye models, Databases, Imaging systems

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Proceedings Article | 11 July 2008 Paper

SNDICE: a direct illumination calibration experiment at CFHT

C. Juramy, E. Barrelet, K. Schahmaneche, P. Bailly, W. Bertoli, C. Evrard, P. Ghislain, A. Guimard, J.-F. Huppert, D. Imbault, D. Laporte, H. Lebbolo, P. Repain, R. Sefri, A. Vallereau, D. Vincent, P. Antilogus, P. Astier, J. Guy, R. Pain, N. Regnault, R. Attapatu, T. Benedict, G. Barrick, J.-C. Cuillandre, S. Gajadhar, K. Ho, D. Salmon

Proceedings Volume 7014, 701451 (2008) https://doi.org/10.1117/12.789051

KEYWORDS: Light emitting diodes, Calibration, Photodiodes, Telescopes, Optical filters, Reflection, Mirrors, Cameras, Planets, Spectral calibration

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Showing 5 of 11 publications

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