Mr. Paul J. Lotz Profile

Paul J. Lotz

Senior Software Systems Engineer at NSFs National Optical-Infrared Astronomy Research Lab

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

LSST secondary mirror assembly

William Gressler, Douglas Neill, John Bagnasco, Paul Lotz, Dave Mills, Mike Warner, Oliver Wiecha, Gregory Bogan, James Ellis, Dale Zajac, Steven Szklany, Ronald Broccolo, Malcolm O'Sullivan, Frank Carbone, Cormic Merle

Proceedings Volume 10700, 1070019 (2018) https://doi.org/10.1117/12.2311316

KEYWORDS: Actuators, Mirrors, Optical fabrication, Optical testing, Spindles, Large Synoptic Survey Telescope, Telescopes, Control systems, Polishing, Surface finishing

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Proceedings Article | 6 July 2018 Paper

Paper

Application of a component template for designing and implementing LSST telescope and site software components

Paul Lotz, Andrés Anania, Harini Sundararaman, Christopher Contaxis

Proceedings Volume 10707, 107071V (2018) https://doi.org/10.1117/12.2311351

KEYWORDS: Large Synoptic Survey Telescope, Telescopes, Control systems, Operating systems, Software engineering, LabVIEW

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Proceedings Article | 18 August 2016 Paper

Paper

Using model based systems engineering for the development of the Large Synoptic Survey Telescope's operational plan

Brian Selvy, Charles Claver, Beth Willman, Don Petravick, Margaret Johnson, Kevin Reil, Stuart Marshall, Sandrine Thomas, Paul Lotz, German Schumacher, Kian-Tat Lim, Tim Jenness, Suzanne Jacoby, Ben Emmons, Tim Axelrod

Proceedings Volume 9911, 99110D (2016) https://doi.org/10.1117/12.2233904

KEYWORDS: Systems modeling, Systems engineering, Large Synoptic Survey Telescope, Observatories, Connectors, Data processing, Data archive systems, Astronomy, Camera shutters, Information technology

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We† provide an overview of the Model Based Systems Engineering (MBSE) language, tool, and methodology being used in our development of the Operational Plan for Large Synoptic Survey Telescope (LSST) operations. LSST’s Systems Engineering (SE) team is using a model-based approach to operational plan development to: 1) capture the topdown stakeholders’ needs and functional allocations defining the scope, required tasks, and personnel needed for operations, and 2) capture the bottom-up operations and maintenance activities required to conduct the LSST survey across its distributed operations sites for the full ten year survey duration. To accomplish these complimentary goals and ensure that they result in self-consistent results, we have developed a holistic approach using the Sparx Enterprise Architect modeling tool and Systems Modeling Language (SysML). This approach utilizes SysML Use Cases, Actors, associated relationships, and Activity Diagrams to document and refine all of the major operations and maintenance activities that will be required to successfully operate the observatory and meet stakeholder expectations. We have developed several customized extensions of the SysML language including the creation of a custom stereotyped Use Case element with unique tagged values, as well as unique association connectors and Actor stereotypes. We demonstrate this customized MBSE methodology enables us to define: 1) the rolls each human Actor must take on to successfully carry out the activities associated with the Use Cases; 2) the skills each Actor must possess; 3) the functional allocation of all required stakeholder activities and Use Cases to organizational entities tasked with carrying them out; and 4) the organization structure required to successfully execute the operational survey. Our approach allows for continual refinement utilizing the systems engineering spiral method to expose finer levels of detail as necessary. For example, the bottom-up, Use Case-driven approach will be deployed in the future to develop the detailed work procedures required to successfully execute each operational activity.

Proceedings Article | 18 August 2016 Paper

Paper

Large Synoptic Survey Telescope mount final design

Shawn Callahan, William Gressler, Sandrine Thomas, Chuck Gessner, Mike Warner, Jeff Barr, Paul Lotz, German Schumacher, Oliver Wiecha, George Angeli, John Andrew, Chuck Claver, Bill Schoening, Jacques Sebag, Victor Krabbendam, Doug Neill, Ed Hileman, Gary Muller, Constanza Araujo , Alfredo Orden Martinez, Manuel Perezagua Aguado, Luis García-Marchena, Ismael Ruiz de Argandoña, Francisco Romero, Ricardo Rodríguez, José Carlos González, Marco Venturini

Proceedings Volume 9906, 99060M (2016) https://doi.org/10.1117/12.2232996

KEYWORDS: Telescopes, Large Synoptic Survey Telescope, Optical instrument design, Cameras, Computer programming, Mirrors, Telescopes, Large Synoptic Survey Telescope, Optical instrument design, Computer programming, Control systems, Switches, Computer aided design, Interfaces

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Proceedings Article | 8 August 2016 Paper

Paper

LSST active optics system software architecture

Sandrine Thomas, Srinivasan Chandrasekharan, Paul Lotz, Bo Xin, Charles Claver, George Angeli, Jacques Sebag, Gregory Dubois-Felsmann

Proceedings Volume 9906, 99063B (2016) https://doi.org/10.1117/12.2231798

KEYWORDS: Large Synoptic Survey Telescope, Telescopes, Wavefront sensors, Mirrors, Wavefronts, Active optics, Adaptive optics, Sensors, Cameras, Image sensors

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Proceedings Article | 8 August 2016 Paper

Paper

LSST control software component design

Paul Lotz, Gregory Dubois-Felsmann, Kian-Tat Lim, Tony Johnson, Srinivasan Chandrasekharan, David Mills, Philip Daly, Germán Schumacher, Francisco Delgado, Steve Pietrowicz, Brian Selvy, Jacques Sebag, Stuart Marshall, Harini Sundararaman, Christopher Contaxis, Robert Bovill, Tim Jenness

Proceedings Volume 9913, 991309 (2016) https://doi.org/10.1117/12.2231796

KEYWORDS: Large Synoptic Survey Telescope, Control systems, Telecommunications, Telescopes, Sensors, Composites, Data acquisition, Motion controllers, Phase modulation, Calibration

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Proceedings Article | 27 July 2016 Paper

Paper

LSST secondary mirror system final design

Douglas Neill, Gregory Bogan, Dale Zajac, Constanza Araujo , William Gressler, Joe DeVries, Edward Hileman, Paul Lotz, Dave Mills, Sandrine Thomas, Thomas Sebring, Jacques Sebag, Mike Warner, Oliver Wiecha

Proceedings Volume 9906, 990667 (2016) https://doi.org/10.1117/12.2234021

KEYWORDS: Actuators, Mirrors, Large Synoptic Survey Telescope, Actuators, Optical fabrication, Telescopes, Sensors, Mirror structures, Control systems, Safety, Active optics

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Proceedings Article | 27 July 2016 Paper

Paper

Final design of the LSST primary/tertiary mirror cell assembly

Douglas Neill, Gary Muller, Ed Hileman, Joe DeVries, Constanza Araujo , William Gressler, Paul Lotz, Dave Mills, Jacques Sebag, Sandrine Thomas, Mike Warner, Oliver Wiecha

Proceedings Volume 9906, 99060Q (2016) https://doi.org/10.1117/12.2234016

KEYWORDS: Mirrors, Large Synoptic Survey Telescope, Control systems, Coating, Actuators, Mirror structures, Optical isolators, Cameras, Telescopes, Interfaces

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Proceedings Article | 27 July 2016 Paper

Paper

Final design of the LSST hexapods and rotator

Ryan Sneed, Douglas Neill, Scott Kidney, Constanza Araujo, William Gressler, Paul Lotz, Dave Milles, Jacques Sebag, Thomas Sebring, Mickael Warner, Oliver Wiecha

Proceedings Volume 9906, 99060K (2016) https://doi.org/10.1117/12.2231327

KEYWORDS: Large Synoptic Survey Telescope, Cameras, Actuators, Telescopes, Mirrors, Optical instrument design, Neodymium, Interfaces, Electromechanical design, Space telescopes

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Proceedings Article | 27 July 2016 Paper

Paper

LSST communications middleware implementation

Dave Mills, German Schumacher, Paul Lotz

Proceedings Volume 9906, 99065C (2016) https://doi.org/10.1117/12.2233099

KEYWORDS: Interfaces, Data communications, Large Synoptic Survey Telescope, Databases, Telescopes, Observatories, Control systems, LabVIEW, Java, Reliability

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Proceedings Article | 7 August 2014 Paper

Paper

LSST Inner Loop Controller (ILC) design and characterization

O. Wiecha, P. Lotz

Proceedings Volume 9151, 91512K (2014) https://doi.org/10.1117/12.2056671

KEYWORDS: Large Synoptic Survey Telescope, Actuators, Control systems, Mirrors, Telescopes, Switches, Analog electronics, Computer programming, Active optics, Sensors

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Proceedings Article | 4 August 2014 Paper

Paper

Systems engineering in the Large Synoptic Survey Telescope project: an application of model based systems engineering

C. Claver, Brian Selvy, George Angeli, Francisco Delgado, Gregory Dubois-Felsmann, Patrick Hascall, Paul Lotz, Stuart Marshall, German Schumacher, Jacques Sebag

Proceedings Volume 9150, 91500M (2014) https://doi.org/10.1117/12.2056781

KEYWORDS: Large Synoptic Survey Telescope, Systems modeling, Systems engineering, Cameras, Telescopes, Observatories, Imaging systems, Data modeling, Control systems, Optical filters

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Proceedings Article | 22 July 2014 Paper

Paper

LSST Telescope and site status

W. Gressler, J. DeVries, E. Hileman, D. Neill, J. Sebag, O. Wiecha, J. Andrew, P. Lotz, W. Schoening

Proceedings Volume 9145, 91451A (2014) https://doi.org/10.1117/12.2056711

KEYWORDS: Mirrors, Large Synoptic Survey Telescope, Telescopes, Cameras, Control systems, Actuators, Imaging systems, Coating, Optical fabrication, Calibration

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Proceedings Article | 18 July 2014 Paper

Paper

Discovery Channel Telescope software progress report: addressing early commissioning and operations challenges

Michael Lacasse, Paul Lotz

Proceedings Volume 9152, 915205 (2014) https://doi.org/10.1117/12.2057324

KEYWORDS: Telescopes, Databases, Control systems, Telecommunications, Software development, Astronomical telescopes, Data archive systems, Observatories, Adaptive optics, Interfaces

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Proceedings Article | 24 September 2012 Paper

Paper

Discovery Channel Telescope software component template and state design: principles and implementation

Paul Lotz, Michael Lacasse, Ryan Godwin

Proceedings Volume 8451, 845108 (2012) https://doi.org/10.1117/12.925084

KEYWORDS: Control systems, Telescopes, Domes, Active optics, LabVIEW, Actuators, Optical instrument design, Systems modeling, Data modeling, Astronomical telescopes

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Proceedings Article | 17 September 2012 Paper

Paper

Status and performance of the Discovery Channel Telescope during commissioning

Stephen Levine, Thomas Bida, Tomas Chylek, Peter Collins, William DeGroff, Edward Dunham, Paul Lotz, Alexander Venetiou, Saeid Zoonemat Kermani

Proceedings Volume 8444, 844419 (2012) https://doi.org/10.1117/12.926415

KEYWORDS: Mirrors, Telescopes, Adaptive optics, Image quality, Control systems, Space telescopes, Data modeling, Observatories, Wavefront sensors, Active optics

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Proceedings Article | 28 July 2010 Paper

Paper

The Discovery Channel Telescope: early integration

Byron Smith, Tomas Chylek, Bill DeGroff, David Finley, Jeffrey Hall, Paul Lotz, Brad McCreight, Alexander Venetiou

Proceedings Volume 7733, 77330A (2010) https://doi.org/10.1117/12.858046

KEYWORDS: Control systems, Telescopes, Mirrors, Adaptive optics, Observatories, Domes, Software development, Cameras, Interfaces, Optical fabrication

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Proceedings Article | 22 July 2010 Paper

Paper

The active optics system for the Discovery Channel Telescope

Byron Smith, Tomas Chylek, Brian Cuerden, Bill DeGroff, Paul Lotz, Alexander Venetiou

Proceedings Volume 7739, 77391T (2010) https://doi.org/10.1117/12.858047

KEYWORDS: Mirrors, Adaptive optics, Actuators, Control systems, Error analysis, Distortion, Telescopes, Collimation, Active optics, Wavefronts

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Proceedings Article | 19 July 2010 Paper

Paper

Discovery Channel Telescope software key technologies

Paul Lotz

Proceedings Volume 7740, 77400O (2010) https://doi.org/10.1117/12.857557

KEYWORDS: LabVIEW, Telecommunications, Telescopes, Human-machine interfaces, Field programmable gate arrays, Receivers, Computing systems, Computer programming, Astronomical telescopes, Observatories

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Proceedings Article | 19 July 2010 Paper

Paper

Discovery Channel Telescope software development overview

Paul Lotz, Daniel Greenspan, Ryan Godwin, Philip Taylor

Proceedings Volume 7740, 77401M (2010) https://doi.org/10.1117/12.857566

KEYWORDS: Control systems, LabVIEW, Telescopes, Mirrors, Software development, Observatories, Databases, Active optics, Domes, Wavefront sensors

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Showing 5 of 20 publications

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