Mr. German Schumacher Profile

German Schumacher

Scientific Programmer at Vera C. Rubin Observatory

SPIE Involvement:

Author

Publications (38)

Proceedings Article | 11 September 2024 Presentation + Paper

Presentation + Paper

Rubin Observatory rotating enclosure (dome) progress and status

G. Marchiori, S. De Lorenzi, J. Martinez, L. Ghedin, T. Marchiori, C. Battistel, C. Manfrin, R. Bressan, L. Vio, T. Niero, V. Krabbendan, J. Barr, Doug Neill, J. Sebag, E. Serrano, Hernan Herrera, W. Van Reeven, G. Schumacher, O. Wiecha, C. Clavier

Proceedings Volume 13094, 1309404 (2024) https://doi.org/10.1117/12.3018132

KEYWORDS: Domes, Telescopes, Displays, Observatories, Large Synoptic Survey Telescope, Control systems, Calibration, Manufacturing, Design, Interfaces

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Proceedings Article | 29 August 2022 Presentation

Presentation

Vera C. Rubin Observatory. The final erection of the big and fast Rotating Enclosure

Gianpietro Marchiori, Simone De Lorenzi, Johana Martinez, Leonardo Ghedin, Tommaso Marchiori, Cristina Battistel, Cristiana Manfrin, Riccardo Bressan, Lorenzo Vio, Matteo Faccioni, Tiziano Niero, Victor Krabbendan, Jeff Barr, Doug Neill, Jacques Sebag, Eduardo Serrano, Hernan Herrera, Wouter van Reeven, German Schumacher, Oliver Wiecha, Chuck Gessner, Chuck Claver

Proceedings Volume 12182, 121821L (2022) https://doi.org/10.1117/12.2629174

KEYWORDS: Observatories, Telescopes, Manufacturing, Wind energy, Lead, Large Synoptic Survey Telescope, Design for manufacturability, Control systems, Cladding, Astronomy

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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

Is the work flow model a suitable candidate for an observatory supervisory control infrastructure?

Philip Daly, Germán Schumacher

Proceedings Volume 9913, 99131W (2016) https://doi.org/10.1117/12.2232020

KEYWORDS: Process modeling, Observatories, Observatories, Telescopes, Large Synoptic Survey Telescope, Control systems, Beam propagation method, Process modeling, Image filtering, Astronomy, Cameras, Data acquisition

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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 | 8 August 2016 Paper

Paper

LSST OCS status and plans

Philip Daly, Germán Schumacher, Francisco Delgado, Dave Mills

Proceedings Volume 9913, 99132O (2016) https://doi.org/10.1117/12.2232025

KEYWORDS: Observatories, Control systems, Databases, Large Synoptic Survey Telescope, Observatories, Control systems, Telescopes, Human-machine interfaces, Calibration, Cameras, Interfaces, Device simulation

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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

The LSST OCS scheduler design

Francisco Delgado, German Schumacher

Proceedings Volume 9149, 91490G (2014) https://doi.org/10.1117/12.2056871

KEYWORDS: Observatories, Large Synoptic Survey Telescope, Data modeling, Control systems, Telescopes, Databases, Systems modeling, Kinematics, Calibration, Prototyping

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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 | 25 July 2014 Paper

Paper

The DECam DAQ System: lessons learned after one year of operations

K. Honscheid, A. Elliott, M. Bonati, E. Buckley-Geer, F. Castander, L. da Costa, H. Diehl, J. Eiting, O. Estay, A. Fausti , B. Flaugher, I. Karliner, S. Kuhlmann, I. Mandrichenko, E. Neilsen, K. Patton, K. Reil, A. Roodman, J. Thaler, G. Schumacher, S. Serrano, E. Suchyta, M. Vittone, A. Walker

Proceedings Volume 9152, 91520G (2014) https://doi.org/10.1117/12.2057073

KEYWORDS: Telescopes, Cameras, Databases, Control systems, Data acquisition, Computing systems, Neodymium, Human-machine interfaces, Imaging systems, Observatories

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Proceedings Article | 24 September 2012 Paper

Paper

A modern approach to upgrading the telescope control system of the CTIO Blanco 4-m telescope

Michael Warner, Rolando Cantarutti, German Schumacher, Eduardo Mondaca, Omar Estay, Manuel Martinez, Victor Aguirre, Rodrigo Alvarez, Rodrigo Leiva, Timothy Abbott, Nicole van der Bliek

Proceedings Volume 8451, 84510U (2012) https://doi.org/10.1117/12.926193

KEYWORDS: Telescopes, Space telescopes, Servomechanisms, Control systems, Field programmable gate arrays, Computer programming, LabVIEW, Motion models, Optical instrument design, Motion measurement

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Proceedings Article | 17 September 2012 Paper

Paper

LSST secondary mirror assembly baseline design

Douglas Neill, William Gressler, Jacques Sebag, Oliver Wiecha, Mike Warner, Bill Schoening, Joe DeVries, John Andrew, German Schumacher, Edward Hileman

Proceedings Volume 8444, 84440J (2012) https://doi.org/10.1117/12.926654

KEYWORDS: Mirrors, Actuators, Control systems, Telescopes, Large Synoptic Survey Telescope, Sensors, Mirror structures, Optical fabrication, Electronics, Cameras

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Proceedings Article | 17 September 2012 Paper

Paper

Dark energy camera installation at CTIO: overview

Timothy Abbott, Freddy Muñoz, Alistair Walker, Chris Smith, Andrés Montane, Brooke Gregory, Roberto Tighe, Patricio Schurter, Nicole van der Bliek, German Schumacher

Proceedings Volume 8444, 844445 (2012) https://doi.org/10.1117/12.925692

KEYWORDS: Telescopes, Mirrors, Imaging systems, Safety, Observatories, Cameras, Nitrogen, Cryogenics, Space telescopes, Control systems

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Proceedings Article | 4 August 2010 Paper

Paper

Using SysML for MBSE analysis of the LSST system

Charles Claver, Gregory Dubois-Felsmann, Francisco Delgado, Pat Hascall, Stuart Marshall, Martin Nordby, Terry Schalk, German Schumacher, Jacques Sebag

Proceedings Volume 7738, 77381D (2010) https://doi.org/10.1117/12.857227

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

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Proceedings Article | 4 August 2010 Paper

Paper

The Large Synoptic Survey Telescope OCS and TCS models

German Schumacher, Francisco Delgado

Proceedings Volume 7738, 77381E (2010) https://doi.org/10.1117/12.857379

KEYWORDS: Systems modeling, Large Synoptic Survey Telescope, Observatories, Control systems, Telescopes, Systems engineering, Control systems design, Cameras, Data modeling, Computer architecture

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Proceedings Article | 23 July 2010 Paper

Paper

Upgrading the controller of the fast tip-tilt tertiary mirror for the SOAR Telescope

Michael Warner, Steve Heathcote, German Schumacher, Rolando Cantarutti, Esteban Parkes

Proceedings Volume 7739, 77393D (2010) https://doi.org/10.1117/12.857943

KEYWORDS: Servomechanisms, Mirrors, Telescopes, Field programmable gate arrays, Space telescopes, Control systems, Analog electronics, Linear filtering, Device simulation, Position sensors

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Proceedings Article | 19 July 2010 Paper

Paper

Middleware design and implementation for LSST

David Mills, German Schumacher

Proceedings Volume 7740, 77402C (2010) https://doi.org/10.1117/12.857233

KEYWORDS: Cameras, Control systems, Large Synoptic Survey Telescope, Databases, Imaging systems, Observatories, Data modeling, Data communications, Electronics, Calibration

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Proceedings Article | 19 July 2010 Paper

Paper

The Blanco Telescope TCS upgrade

German Schumacher, Eduardo Mondaca, Michael Warner, Manuel Martinez, Omar Estay, Timothy M. Abbott

Proceedings Volume 7740, 77402H (2010) https://doi.org/10.1117/12.857986

KEYWORDS: Telescopes, Control systems, Computer programming, Linear filtering, Large Synoptic Survey Telescope, Telecommunications, Fiber optics, LabVIEW, Fiber optic communications, Interfaces

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Proceedings Article | 19 July 2010 Paper

Paper

The DECam data acquisition and control system

K. Honscheid, J. Eiting, A. Elliott, J. Annis, M. Bonati, E. Buckley-Geer, F. Castander, L. da Costa, M. Haney, W. Hanlon, I. Karliner, K. Kuehn, S. Kuhlmann, S. Marshall, M. Meyer, E. Neilsen, R. Ogando, A. Roodman, T. Schalk, G. Schumacher, M. Selen, S. Serrano, J. Thaler, W. Wester

Proceedings Volume 7740, 77401K (2010) https://doi.org/10.1117/12.856734

KEYWORDS: Image processing, Control systems, Image quality, Telescopes, Data acquisition, Cameras, Charge-coupled devices, Databases, Computing systems, Distributed computing

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Proceedings Article | 19 July 2010 Paper

Paper

Graphical user interfaces of the dark energy survey

Jacob Eiting, Ann Elliott, Klaus Honscheid, Jim Annis, Elizabeth Buckley-Geer, William Wester, Michael Haney, William Hanlon, Inga Karliner, Jon Thaler, Mark Meyer, Marco Bonati, German Schumacher, Kyler Kuehn, Stephen Kuhlmann, Terry Schalk, Stuart Marshall, Aaron Roodman

Proceedings Volume 7740, 774012 (2010) https://doi.org/10.1117/12.856726

KEYWORDS: Human-machine interfaces, Control systems, Observatories, Databases, Image processing, Telecommunications, Information operations, Charge-coupled devices, Telescopes, Cameras

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Proceedings Article | 14 July 2008 Paper

Paper

Enabling technologies and constraints for software sharing in large astronomy projects

Gianluca Chiozzi, Alan Bridger, Kim Gillies, Bret Goodrich, Jimmy Johnson, Kevin McCann, German Schumacher, Stephen Wampler

Proceedings Volume 7019, 70190Y (2008) https://doi.org/10.1117/12.790419

KEYWORDS: Observatories, Telescopes, Astronomy, Standards development, Software development, Data modeling, Control systems, Optical instrument design, Interfaces, Astronomical telescopes

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Proceedings Article | 14 July 2008 Paper

Paper

The Large Synoptic Survey Telescope middleware messaging system

German Schumacher, Francisco Delgado

Proceedings Volume 7019, 70190V (2008) https://doi.org/10.1117/12.789687

KEYWORDS: Control systems, Large Synoptic Survey Telescope, Telecommunications, Computer architecture, Data communications, Databases, Computer programming, Systems modeling, Control systems design, Distributed computing

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Proceedings Article | 10 July 2008 Paper

Paper

Adaptive periodic error correction for Heidenhain tape encoders

Michael Warner, Victor Krabbendam, German Schumacher

Proceedings Volume 7012, 70123N (2008) https://doi.org/10.1117/12.787462

KEYWORDS: Telescopes, Head, Error analysis, Computer programming, Signal processing, Servomechanisms, Large Synoptic Survey Telescope, Computer simulations, Control systems, Data modeling

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Proceedings Article | 10 July 2008 Paper

Paper

Cerro Tololo Inter-American Observatory, Victor M. Blanco 4-m Telescope: an upgrade to the telescope control system

Timothy M. Abbott, German Schumacher, Michael Warner, Eduardo Mondaca, Ricardo Schmidt, Rolando Cantarutti, Manuel Martinez, Omar Estay, Francisco Delgado, Alistair Walker

Proceedings Volume 7012, 70123K (2008) https://doi.org/10.1117/12.789614

KEYWORDS: Telescopes, Computer programming, Control systems, Observatories, Cameras, Infrared telescopes, Astronomical telescopes, Imaging systems, Large Synoptic Survey Telescope, Servomechanisms

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Proceedings Article | 17 September 2007 Paper

Paper

Active tangent link system for transverse support of large thin meniscus mirrors

Douglas Neill, Victor Krabbendam, John Andrew, Michael Warner, Steve Heathcote, German Schumacher, Brooke Gregory, Eduardo Serrano

Proceedings Volume 6665, 66650F (2007) https://doi.org/10.1117/12.730273

KEYWORDS: Mirrors, Actuators, Finite element methods, Telescopes, Monochromatic aberrations, Control systems, Wavefronts, Space telescopes, Active optics, Systems modeling

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Proceedings Article | 27 June 2006 Paper

Paper

LSST control system

Germán Schumacher, Michael Warner, Victor Krabbendam

Proceedings Volume 6274, 627403 (2006) https://doi.org/10.1117/12.671284

KEYWORDS: Large Synoptic Survey Telescope, Control systems, Telescopes, Cameras, Observatories, Control systems design, Data communications, Databases, Liquid crystals, Imaging systems

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Proceedings Article | 23 June 2006 Paper

Paper

Cerro Tololo Inter-American Observatory, Victor M. Blanco 4-m Telescope, and the Dark Energy Survey

Timothy Abbott, Rolando Catarutti, Eduardo Mondaca, Andres Montane, German Schumacher, Roberto Tighe, Alistair Walker, Del Allspach, Herman Cease, Brenna Flaugher, John Peoples, Andrew Stefanik, Jon Thaler, Vaidotas Simatis

Proceedings Volume 6267, 62673M (2006) https://doi.org/10.1117/12.672527

KEYWORDS: Telescopes, Mirrors, Control systems, Observatories, Imaging systems, Active optics, Cameras, Computer programming, CCD cameras, Image quality

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Proceedings Article | 29 September 2004 Paper

Paper

SOAR Telescope: 4-meter high-performance-mount performance results

Michael Warner, Victor Krabbendam, German Schumacher, Juan Delgadillo

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.552601

KEYWORDS: Telescopes, Computer programming, Head, Servomechanisms, Data modeling, Calibration, Cameras, Observatories, Optical instrument design, Optical fabrication

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Proceedings Article | 28 September 2004 Paper

Paper

SOAR 4.1-m Telescope: from commissioning to early science

Victor Krabbendam, Stephen Heathcote, German Schumacher, Hugo Schwarz, Thomas Sebring, Michael Warner

Proceedings Volume 5489, (2004) https://doi.org/10.1117/12.552602

KEYWORDS: Telescopes, Mirrors, Control systems, Adaptive optics, Wavefront sensors, Actuators, Gemini Observatory, Imaging systems, Coating, Optical fabrication

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Proceedings Article | 15 September 2004 Paper

Paper

SOAR TCS: from implementation to operation

German Schumacher, Steve Heathcote, Victor Krabbendam

Proceedings Volume 5496, (2004) https://doi.org/10.1117/12.552043

KEYWORDS: Telescopes, LabVIEW, Software development, Computer programming, Control systems, Visualization, Telecommunications, Switches, Lanthanum, Human-machine interfaces

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Proceedings Article | 15 September 2004 Paper

Paper

Software and control system for SOAR Telescope active optical system (AOS)

Andrea Sarnik, Conrad Neufeld, Robert McGuffie, German Schumacher

Proceedings Volume 5496, (2004) https://doi.org/10.1117/12.551829

KEYWORDS: Actuators, Telescopes, Databases, Mirrors, Phase modulation, Control systems, Adaptive optics, Data processing, Secondary tip-tilt mirrors

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Proceedings Article | 13 December 2002 Paper

Paper

SOAR TCS: from prototype to implementation

Germán Schumacher, Michael Ashe

Proceedings Volume 4848, (2002) https://doi.org/10.1117/12.461262

KEYWORDS: Telescopes, Control systems, LabVIEW, Computing systems, Systems modeling, Prototyping, Instrument modeling, Computer architecture, Software development, Domes

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Proceedings Article | 13 December 2002 Paper

Paper

SOAR control systems operation: OCS and TCS

Michael Ashe, Germán Schumacher, Thomas Sebring

Proceedings Volume 4848, (2002) https://doi.org/10.1117/12.463559

KEYWORDS: LabVIEW, Telescopes, Human-machine interfaces, Control systems, Prototyping, Adaptive optics, Device simulation, Observatories, Calibration, Gemini Observatory

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Proceedings Article | 27 November 2002 Paper

Paper

Remote use of the SOAR 4.25m telescope with LabVIEW

Gerald Cecil, Adam Crain, German Schumacher

Proceedings Volume 4845, (2002) https://doi.org/10.1117/12.456615

KEYWORDS: Telescopes, LabVIEW, Control systems, Astronomical telescopes, Astronomy, Fiber reinforced polymers, Lithium, Detector arrays, Computing systems

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Proceedings Article | 16 June 2000 Paper

Paper

SOAR telescope control system: a rapid prototype and development in LabVIEW

Michael Ashe, German Schumacher

Proceedings Volume 4009, (2000) https://doi.org/10.1117/12.388419

KEYWORDS: LabVIEW, Telescopes, Prototyping, Control systems, Human-machine interfaces, Software development, Visualization, Domes, Gemini Observatory, Databases

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Proceedings Article | 21 August 1998 Paper

Paper

Performance of a novel tip-tilt secondary system on the Blanco 4-m telescope

Ronald Probst, Patrice Bouchet, German Schumacher, Ricardo Schmidt

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317320

KEYWORDS: Telescopes, Stars, Sensors, Mirrors, CCD image sensors, Charge-coupled devices, Infrared imaging, Image quality, Cameras, Control systems

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Proceedings Article | 8 June 1995 Paper

Paper

Active optics system for the CTIO 4-m telescope

German Schumacher, Jack Baldwin, Gabriel Perez, Eduardo Mondaca

Proceedings Volume 2479, (1995) https://doi.org/10.1117/12.211448

KEYWORDS: Mirrors, Telescopes, Monochromatic aberrations, Active optics, Switches, Control systems, Image analysis, Actuators, Observatories, Image quality

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Showing 5 of 38 publications

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