Mr. Eric J. Grigel Profile

Eric J. Grigel

Architect at M3 Engineering & Technology Corp

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Author

Publications (10)

Proceedings Article | 11 September 2024 Poster + Paper

Maintaining the observatory: the role of facility condition assessments in astronomical facilities

Grecia Falcon, David Adriaanse, Eric Grigel, John Maclean, Piero Anticona

Proceedings Volume 13094, 130943Z (2024) https://doi.org/10.1117/12.3015086

KEYWORDS: Safety, Observatories, Inspection, Astronomy, Sustainability, Databases, Compliance, Engineering

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Proceedings Article | 11 September 2024 Presentation + Paper

Safeguarding astronomical research: innovative and traditional techniques for rainwater leak detection in telescope observatories

Eric Grigel, David Adriaanse, Grecia Falcon, Dana Chandler, Eric Chandler, Andrew Dean

Proceedings Volume 13094, 130940D (2024) https://doi.org/10.1117/12.3014714

KEYWORDS: Telescopes, Inspection, Rain, RGB color model, 3D modeling, Thermal imaging cameras, Observatories, Astronomical telescopes, Design, Cameras

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Ground-based telescope observatories are typically located in harsh environments. Due to their location, they are subject to a wide range of severe environmental conditions such as seismic events, strong winds, and large diurnal temperature swings including freeze/thaw cycles. It is common for telescope observatories to experience fatigue and degradation as a result of their unique dynamic use within these harsh environmental conditions. One specific result of this degradation includes rainwater leakage into the rotating telescope enclosure. This water leakage has the potential to cause serious damage to interior components of the telescope enclosure, including the telescope and its sensitive instruments. Innovative techniques for detecting rainwater leakage include the use of a thermal imaging camera in conjunction with an Unmanned Aircraft System (UAS) / drone. Standard RGB photography accompanies thermal integrated analysis to allow a non-invasive peer into the health of the telescope enclosure. The drone and its specialized camera capture visual data to identify any abnormality found and cross reference the thermal anomaly to a physical place on the structure. Traditional techniques used for detection include trained and experienced personnel physically observing the structure alongside the data captured by the drone. Using the 8.2-meter Subaru Telescope on Maunakea in Hawaii as a case study, this paper will present innovative and traditional techniques for detection of rainwater leakage into the rotating telescope enclosure and other sensitive areas. The Subaru Telescope was constructed in the late 1990’s and is starting to experience predictable degradation of the rotating enclosure after 20+ years of use on Maunakea. By utilizing innovative and traditional techniques for rainwater leak detection, the Subaru Telescope will be able to better identify problem areas and start to repair these areas to prevent further degradation. Lessons learned from the experience will better prepare Architects and Engineers for the design of future ground-based telescope observatories.

Proceedings Article | 29 August 2022 Poster + Paper

Design and construction of observatory azimuth rotation systems with economical construction tolerances

Cory Lindh, Eric Manuel, Eric Grigel, David Adriaanse

Proceedings Volume 12182, 1218247 (2022) https://doi.org/10.1117/12.2630625

KEYWORDS: Tolerancing, Observatories, Finite element methods, Structural engineering, Reliability, Telescopes, Monte Carlo methods, Structural analysis, Statistical analysis

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Proceedings Article | 10 July 2018 Presentation + Paper

Transforming the Canada France Hawaii Telescope (CFHT) into the Maunakea Spectroscopic Explorer (MSE): a conceptual observatory building and facilities design

Steven Bauman, Greg Barrick, Tom Benedict, Armando Bilbao, Alexis Hill, Nicolas Flagey, Casey Elizares, Mike Gedig, Greg Green, Eric Grigel, David Lo, Ivan Look, Thomas Lorentz, Nathan Loewen, Eric Manuel, Alan McConnachie, Ronny Muller, Gaizka Murga, Rick Murowinski, Federico Ruan, Derrick Salmon, Kei Szeto, Jose Teran, Rafael Urrutia

Proceedings Volume 10704, 107041E (2018) https://doi.org/10.1117/12.2311350

KEYWORDS: Telescopes, Observatories, Space telescopes, Coating, Optical instrument design, Spectrographs, Spectroscopes, Spectroscopy, Carbon, Soil science

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Proceedings Article | 6 July 2018 Paper

Telescope pier seismic isolation for the Giant Magellan Telescope

Eric Manuel, Michael Constantinou, Eric Grigel, Bruce Bigelow, José Terán, Bahram Talison

Proceedings Volume 10700, 107005Y (2018) https://doi.org/10.1117/12.2314654

KEYWORDS: Telescopes, Optical isolators, Space telescopes, Earthquakes, Prototyping, Optical instrument design, Manufacturing, Observatories, Bridges, Interfaces

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Proceedings Article | 6 July 2018 Presentation + Paper

GMT site, enclosure, and facilities: design and construction update

Eric Grigel, Bruce Bigelow, William Burgett, Gustavo Arriagada, Robert Turner, Bahram Talison, Christopher Madden, Francisco Figueroa, Jose Teran, Eric Manuel

Proceedings Volume 10700, 107000A (2018) https://doi.org/10.1117/12.2314554

KEYWORDS: Telescopes, Space telescopes, Optical instrument design, Device simulation, Computational fluid dynamics, Mirrors, Roads, Observatories, Optical turbulence, 3D modeling

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Proceedings Article | 6 July 2018 Paper

Enclosure azimuth rotation system analysis of alternatives for the Giant Magellan Telescope

Cory Lindh, Tom Hayes, Eric Grigel, José Terán, Bruce Bigelow, Christopher Madden

Proceedings Volume 10700, 107002L (2018) https://doi.org/10.1117/12.2313886

KEYWORDS: Telescopes

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Proceedings Article | 27 July 2016 Paper

GMT site, enclosure, and facilities design and development overview and update

Jose Teran, William Burgett, Eric Grigel, Bruce Bigelow, Eduardo Donoso, Francisco Figueroa

Proceedings Volume 9906, 990610 (2016) https://doi.org/10.1117/12.2232573

KEYWORDS: Observatories, Optical instrument design, Telescopes, Space telescopes, Camera shutters, Mirrors, Interfaces, Electromechanical design, Metrology, Metals

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Proceedings Article | 22 July 2014 Paper

GMT site: facilities and enclosure design overview

Jose Teran, Michael Sheehan, Daniel Neff, Eric Grigel, David Adriaanse, Arash Farahani

Proceedings Volume 9145, 91452K (2014) https://doi.org/10.1117/12.2054326

KEYWORDS: Telescopes, Space telescopes, Camera shutters, Mirrors, Bridges, Observatories, Roads, Lanthanum, Optical instrument design, Liquid crystal on silicon

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Proceedings Article | 22 July 2014 Paper

Building information modeling (BIM) approach to the GMT Project

Jose Teran, Michael Sheehan, Daniel Neff, David Adriaanse, Eric Grigel, Arash Farahani

Proceedings Volume 9145, 91454M (2014) https://doi.org/10.1117/12.2055193

KEYWORDS: Data modeling, 3D modeling, Systems modeling, Computer aided design, Telescopes, Document management, Space telescopes, Observatories, Solid modeling, Process modeling

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Showing 5 of 10 publications

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