Dr. Craig A. Walther Profile

Dr. Craig A. Walther

Head of ETIS at East Asian Observatory

SPIE Involvement:

Author

Publications (29)

Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

The repair work and future plan for the Auto-Correlation Spectral Imaging System (ACSIS) at the James Clerk Maxwell Telescope (JCMT)

Kuan-Yu Liu, Dan Bintley, Ryan Berthold, Graham Bell, Ming-Jye Wang, Ming-Tang Chen, Yau-Te Huang, Chih-Chiang Han, Chau-Ching Chiong, Chao-Te Li, Homin Jiang, Derek Kubo, Gary Fuller, Weiye Zhong, Junhao Liu, Harriet Parsons, Jessica Dempsey, Per Friberg, Maren Purves, Sarah Graves, Jamie Cookson, Ed Sison, Xue-Jian Jiang, Izumi Mizuno, Shaoliang Li, William Stahm, Craig Walther, Wei Yu, Ran Duan

Proceedings Volume 12190, 1219031 (2022) https://doi.org/10.1117/12.2628389

KEYWORDS: Receivers, Astronomy, Telescopes, Amplifiers, Switches, Electronics, Observatories, Imaging systems, Imaging spectroscopy, Heterodyning

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Improving observatory efficiency: noise limited observing at the JCMT

Sarah Graves, Harriet Parsons, Jessica Dempsey, Graham Bell, Mark Rawlings, Steven Mairs, Ryan Berthold, Craig Walther, Izumi Mizuno, Shaoliang Li, Dan Bintley, Per Friberg, Maren Purves, John Kuroda

Proceedings Volume 11449, 1144917 (2020) https://doi.org/10.1117/12.2562760

KEYWORDS: Signal to noise ratio, Observatories, Telescopes

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Implementing remote observing at the JCMT

Harriet Parsons, Jessica Dempsey, Dan Bintley, Craig Walther, Sarah Graves, William Stahm, Maren Purves, Kevin Silva, Alexis Acohido, Graham Bell, Ryan Berthold, Jamie Cookson, Vernon DeMattos, Devin Estrada, Miriam Fuchs, David Fuselier, Paul Ho, John Kuroda, Shaoliang Li, Steven Mairs, Mark Rawlings

Proceedings Volume 11449, 114490I (2020) https://doi.org/10.1117/12.2561657

KEYWORDS: Switches, Observatories, Astronomical telescopes, Telescopes, Astronomy, Safety, Software engineering

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

SIS mixers study on Heterodyne Array Receiver Program (HARP) at JCMT

Kuan-Yu Liu, Ming-Jye Wang, C. Y. Edward Tong, Per Friberg, Gary A. Fuller, Tse-Jun Chen, Yen-Pin Chang, Wei-Chun Lu, Dan Bintley, Ming-Tang Chen, Chih-Chiang Han, Sheng-Feng Yen, Jessica Dempsey, Shaoliang Li, Craig Walther, Vernon DeMattos, Jamie Cookson, Graham Bell, Xue-Jian Jiang, Harriet Parson, Izumi Mizuno, Taishi Nammoto, Weiye Zhong

Proceedings Volume 11453, 114533R (2020) https://doi.org/10.1117/12.2561192

KEYWORDS: Receivers, Heterodyning, Waveguides, Double sideband modulation, Sensors

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Commissioning of Nāmakanui on the JCMT

Izumi Mizuno, Per Friberg, Ryan Berthold, Harriet Parsons, Chih-Chiang Han, Alexis Acohido, Graham Bell, David Berry, Dan Bintley, Ming-Tang Chen, Alyssa Clark, Jamie Cookson, Vernon DeMattos, Jessica Dempsey, Jason Fleck, Kuo-chieh Fu, Miriam Fuchs, Sarah Graves, Paul Ho, Sung-Po Hsu, YauDe Huang, Xue-Jian Jiang, Derek Kubo, John Kuroda, Shaoliang Li, Steve Mairs, Callie Matulonis, Mailani Neil, Neal Oliveira, Maren Purves, Mark Rawlings, Ya-Che Shih, Kevin Silva, Ed Sison, Patrice Smith, Ranjani Srinivasan, William Stahm, Alexandra Tetarenko, Pablo Torne, Craig Walther, Chao-Ching Wang, Ta-Shun Wei

Proceedings Volume 11453, 114533T (2020) https://doi.org/10.1117/12.2561742

KEYWORDS: Receivers, Telescopes, Polarization, Beam shaping, Switches

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Every second of science is sacred: automating science operations tracking at JCMT

Jessica Dempsey, Sarah Graves, Harriet A. Parsons, Craig Walther, Paul T. Ho, Graham Bell, Michael Pohlen

Proceedings Volume 10704, 107040M (2018) https://doi.org/10.1117/12.2313849

KEYWORDS: Observatories, Databases, Telescopes, Data archive systems, Opacity, Advanced distributed simulations, Control systems, Interfaces, Data modeling

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Proceedings Article | 9 July 2018 Presentation + Paper

Presentation + Paper

Electronics instrumentation for the Greenland Telescope

Derek Kubo, Chih-Chiang Han, Hiroaki Nishioka, Ryan Chilson, Ranjani Srinivasan, Sheng-Feng Yen, Kuo-Chieh Fu, Homin Jiang, Kuan-Yu Liu, Ta-Shun Wei, Chih-Wei Huang, Chen-Yu Yu, Peter Oshiro, Shu-Hao Chang, Chung-Cheng Chen, Philippe Raffin, Yau-De Huang, Pierre Martin-Cocher, Ming-Tang Chen, Makoto Inoue, Satoki Matsushita, Keiichi Asada, Shoko Koyama, Patrick Koch, Paul T. Ho, Yang-Tai Shaw, Timothy Norton, Nimesh Patel, Shepherd Doeleman, Daniel Bintley, Craig Walther, Per Friberg, Jessica Dempsey, Hideo Ogawa, Kimihiro Kimura, Yutaka Hasegawa, Ching-Tang Liu, Kou-Chang Han, Song-Chu Chang, Li-Ming Lu

Proceedings Volume 10708, 1070816 (2018) https://doi.org/10.1117/12.2312241

KEYWORDS: Receivers, Switches, Photonics, Telescopes, Sensors, Antennas, Electronics, Spectroscopy, Oscillators

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Proceedings Article | 9 July 2018 Presentation + Paper

Presentation + Paper

GLT receiver commissioning at JCMT and future JCMT instrumentation

Dan Bintley, Per Friberg, Ryan Berthold, Tim Chuter, Kuan-Yu Liu, Craig Walther, Jessica Dempsey, Paul Ho, Helen McGregor, Satoki Matsushita, Keiichi Asada, Shoko Koyama, Hiroaki Nishioka, Chih-Chiang Han, Chih-Wei Huang, Lupin Lin, Ta-Shun Wei, Derek Kubo, Ranjani Srinivasan, Ramprasad Rao, Geoff Bower, Peter Oshiro, Ming-Tang Chen

Proceedings Volume 10708, 1070815 (2018) https://doi.org/10.1117/12.2313083

KEYWORDS: Receivers, Telescopes, Mirrors, Polarization, Calibration, Astronomy, Antennas, Optical correlators, Observatories

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Proceedings Article | 9 July 2018 Paper

Paper

The first-light receivers for the Greenland Telescope

Chih-Chiang Han, Ming-Tang Chen, Yau-De Huang, Derek Kubo, Chih-Cheng Chang, Shu-Hao Chang, Ta-Shun Wei, Ji-Dian Huang, Chung-Chen Chen, Philippe Raffin, Ching-Tang Liu, Paul T. Ho, Makota Inoue, Satoki Matsushita, Keiichi Asada, Timothy Norton, Ryan Chilson, Ranjani Srinivasan, Kuan-Yu Liu, Chao-Te Li, Daniel Bintley, Craig Walther, Per Friberg, Jessica Dempsey, Hideo Ogawa, Kimihiro Kimura, Yutaka Hasagawa, Sivasankaran Srikanth

Proceedings Volume 10708, 1070835 (2018) https://doi.org/10.1117/12.2313475

KEYWORDS: Receivers, Telescopes, Antennas, Reflectors, Observatories, Polarization

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Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

The Greenland telescope: Thule operations

Ming-Tang Chen, Philippe Raffin, Paul T. Ho, Makoto Inoue, Ching-Tang Liu, Yau-De Huang, Chih-Chiang Han, Timothy Norton, Satoki Matsushita, Keiichi Asada, George Nystrom, Derek Kubo, Nimesh Patel, Shu-Hao Chang, Ta-Shun Wei, Pierre Martin-Cocher, Homin Jiang, Paul Shaw, Hiroaki Nishioka, Chih-Wei L. Huang, Chung-Chen Chen, Patrick Koch, Ryan Chilson, Ranjani Srinivasan, Kuan-Yu Liu, Chen-Yu Yu, Geoffrey Bower, Peter Oshiro, William Snow, Shoko Koyama, Jun Yi Koay, Chao-Te Li, Wen-Ping Lo, Chih-Cheng Chang, Masanori Nakamura, Zheng Meyer-Zhao, Hung-Yi Pu, Lupin Lin, Daniel Bintley, Craig Walther, Per Friberg, Jessica Dempsey, T. Sridharan, Sheperd Doeleman, Roger Brissenden, Hideo Ogawa, Kimihiro Kimura, Yutaka Hasegawa, Jinchi Hao, Kuo-Chang Han, Song-Chu Chang, Li-Ming Lu, Juan-Carlos Algaba Marcos, Alex Allardi, Aaron Faber, Fu-li Hsu, Wei-Long Chen, Fang-Chia Hsieh

Proceedings Volume 10700, 107000H (2018) https://doi.org/10.1117/12.2313378

KEYWORDS: Antennas, Telescopes, Receivers, Observatories, Astronomy, Astrophysics

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Proceedings Article | 6 July 2018 Paper

Paper

Control and monitoring system for the Greenland Telescope: computers, network and software

Hiroaki Nishioka, Chih-Wei Locutus Huang, Nimesh Patel, Derek Kubo, Ranjani Srinivasan, Chih-Chiang Han, Chen-Yu Yu, Homin Jiang, Lupin Chun-Che Lin, Zheng Meyer-Zhao, Pierre Martin-Cocher, Satoki Matsushita, Keiichi Asada, Makoto Inoue, Shoko Koyama, Craig Walther, Dan Bintley, Kuan-Yu Liu, Ryan Berthold, Tim Chuter, Per Friberg, Geoffrey Bower, Shu-Hao Chang, Ming-Tang Chen, Jessica Dempsey, Sheperd Doeleman, Yau-De Huang, Paul T. Ho, Jun-Yi Koay, Patrick Koch, Ching-Tang Liu, Wen-Ping Lo, Masanori Nakamura, Timothy Norton, George Nystrom, Peter Oshiro, Ta-Shun Wei

Proceedings Volume 10700, 107005N (2018) https://doi.org/10.1117/12.2313104

KEYWORDS: Computing systems, Receivers, Global Positioning System, Antennas, Spectroscopy, Control systems, Telescopes, Switches, Sensors, Astronomy

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Proceedings Article | 6 July 2018 Paper

Paper

Commissioning status of the Greenland Telescope (GLT)

Satoki Matsushita, Keiichi Asada, Makoto Inoue, Hiroaki Nishioka, Chih-Wei Huang, Nimesh Patel, Jun Yi Koay, Shoko Koyama, Patrick Koch, Zheng Meyer-Zhao, Lupin C.-C. Lin, Paul T. Ho, Ming-Tang Chen, Timothy Norton, Kuan-Yu Liu, Chen-Yu Yu, Do-Young Byun, Juan-Carlos Algaba Marcos, Alex Allardi, Geoffrey Bower, Shu-Hao Chang, Chung-Chen Chen, Ryan Chilson, Aaron Faber, Chih-Chiang Han, Yau-De Huang, Homin Jiang, Derek Kubo, Ching-Tang Liu, Wen-Ping Lo, Pierre Martin-Cocher, Masanori Nakamura, George Nystrom, Peter Oshiro, Hung-Yi Pu, Philippe Raffin, Paul Shaw, Williams Snow, Ranjani Srinivasan, Ta-Shun Wei, Ryan Berthold, Daniel Bintley, Jessica Dempsey, Per Friberg, Craig Walther, Jonathan Weintroub, André Young, Ken Young, T. Sridharan, Sheperd Doeleman, Roger Brissenden, Hideo Ogawa, Kimihiro Kimura, Yutaka Hasegawa, Jinchi Hao, Kou-Chang Han, Song-Chu Chang, Li-Ming Lu

Proceedings Volume 10700, 1070029 (2018) https://doi.org/10.1117/12.2310046

KEYWORDS: Receivers, Telescopes, Antennas, Astronomy, Observatories, Radio optics, Radio astronomy, Radio interferometry, Submillimeter telescopes

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Proceedings Article | 8 August 2016 Paper

Paper

Remote operations at UKIRT, Cassegrain included, 2 years later

Maren Hauschildt-Purves, Craig Walther, Ryan Berthold, Jamie Cookson

Proceedings Volume 9913, 991332 (2016) https://doi.org/10.1117/12.2233835

KEYWORDS: Telescopes, Mid-IR, Observatories, Observatories, Switches, Space telescopes, Electronics, Cameras, Astronomy, Mirrors, Space operations

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Proceedings Article | 3 August 2016 Paper

Paper

The JCMT future instrumentation project

Jessica Dempsey, Paul T. Ho, Craig Walther, Per Friberg, Dan Bintley, Ming-Tang Chen

Proceedings Volume 9908, 990807 (2016) https://doi.org/10.1117/12.2231564

KEYWORDS: Heterodyning, Observatories, Bolometers, Telescopes, Receivers, Cameras, Astronomy, Spectroscopy, Optical instrument design, Cryogenics

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Proceedings Article | 19 July 2016 Paper

Paper

Next generation heterodyne array for JCMT

M.-T. Chen, J. Dempsey, P. T. Ho, P. Friberg, D. Bintley, C. Walther

Proceedings Volume 9914, 991429 (2016) https://doi.org/10.1117/12.2231566

KEYWORDS: Heterodyning, Telescopes, Telescopes, Observatories, Receivers, Receptors, Single sideband modulation, Astronomy, Space telescopes, Sensors, Polarization

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Proceedings Article | 15 July 2016 Paper

Paper

The JCMT as operated by the East Asian Observatory: a brief (but thrilling) history

Jessica Dempsey, Paul Ho, Craig Walther, Per Friberg, Graham Bell, Harriet Parsons, Ming-Tang Chen

Proceedings Volume 9910, 99100O (2016) https://doi.org/10.1117/12.2231568

KEYWORDS: Observatories, Telescopes, Astronomy, Astronomical telescopes, Receivers, Space telescopes, Opacity, Stars, Electroluminescence, Astrophysics

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Proceedings Article | 19 August 2014 Paper

Paper

SCUBA-2: an update on the performance of the 10,000 pixel bolometer camera after two years of science operation at the JCMT

Dan Bintley, Wayne Holland, Michael MacIntosh, Per Friberg, Graham Bell, Daniel Berke, David Berry, Ryan Berthold, Jamie Cookson, Iain Coulson, Malcolm Currie, Jessica Dempsey, Andrew Gibb, Bryan Gorges, Sarah Graves, Tim Jenness, Douglas Johnstone, Harriet A. Parsons, Holly Thomas, Craig Walther, Jan G. Wouterloot

Proceedings Volume 9153, 915303 (2014) https://doi.org/10.1117/12.2055231

KEYWORDS: Sensors, Camera shutters, Astronomy, Bolometers, Semiconducting wafers, Calibration, Telescopes, Technetium, Multiplexers, Superconductors

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Proceedings Article | 6 August 2014 Paper

Paper

Implementing extended observing at the JCMT

Craig Walther, Jessica Dempsey, Ian Campbell

Proceedings Volume 9149, 91492G (2014) https://doi.org/10.1117/12.2056953

KEYWORDS: Telescopes, Photonic integrated circuits, Databases, Cameras, Switches, Safety, Astronomy, Data communications, Astronomical telescopes, Observatories

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Proceedings Article | 6 August 2014 Paper

Paper

Setting the standard: 25 years of operating the JCMT

Jessica Dempsey, Graham Bell, Antonio Chrysostomou, Iain Coulson, Gary Davis, Frossie Economou, Per Friberg, Timothy Jenness, Doug Johnstone, Remo P. Tilanus, Holly Thomas, Craig Walther

Proceedings Volume 9149, 91491F (2014) https://doi.org/10.1117/12.2056862

KEYWORDS: Telescopes, Observatories, Opacity, Heterodyning, Receivers, Astronomy, Feedback loops, Submillimeter telescopes, Databases, Astronomical telescopes

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Proceedings Article | 18 July 2014 Paper

Paper

Recommissioning Cassegrain instruments at the telescope currently still known as UKIRT

Maren Hauschildt-Purves, Craig Walther, Timothy Chuter, Ryan Berthold, Bryan Gorges, Graham Bell

Proceedings Volume 9152, 91520U (2014) https://doi.org/10.1117/12.2057111

KEYWORDS: Control systems, Telescopes, Mirrors, Switches, Electronics, Operating systems, Domes, Wavefront sensors, Databases, Astronomy

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Proceedings Article | 27 September 2012 Paper

Paper

A new era of wide-field submillimetre imaging: on-sky performance of SCUBA-2

Jessica Dempsey, Wayne Holland, Antonio Chrysostomou, David Berry, Daniel Bintley, Edward Chapin, Simon Craig, Iain Coulson, Gary Davis, Per Friberg, Tim Jenness, Andy Gibb, Harriet A. Parsons, Douglas Scott, Holly Thomas, Remo P. Tilanus, Ian Robson, Craig Walther

Proceedings Volume 8452, 845202 (2012) https://doi.org/10.1117/12.926547

KEYWORDS: Calibration, Bolometers, Astronomy, Mars, Telescopes, Sensors, Galactic astronomy, Camera shutters, Signal attenuation, Interference (communication)

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Proceedings Article | 24 September 2012 Paper

Paper

UKIRT remote operations fail-safe system

Bryan Gorges, Craig Walther, Tim Chuter

Proceedings Volume 8451, 84510Z (2012) https://doi.org/10.1117/12.925508

KEYWORDS: Telescopes, Control systems, Domes, Photonic integrated circuits, Telecommunications, Computing systems, Mirrors, Human-machine interfaces, Sensors, Camera shutters

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Proceedings Article | 24 September 2012 Paper

Paper

Scaling the summit of the submillimetre: instrument performance of SCUBA-2

Dan Bintley, Michael MacIntosh, Wayne Holland, Jessica Dempsey, Per Friberg, John Kuroda, Erik Starman, Holly Thomas, Craig Walther, Xiaofeng Gao, Peter A. Ade, Rashmi Sudiwala, Camelia Dunare, William Parkes, Anthony Walton, Kent Irwin, Gene Hilton, Michael Niemack, Mandana Amiri, Viktoria Asboth, Bryce Burger, Edward Chapin, Mark Halpern, Matthew Hasselfield, Adam Woodcraft

Proceedings Volume 8452, 845208 (2012) https://doi.org/10.1117/12.926613

KEYWORDS: Sensors, Technetium, Bolometers, Detector arrays, Multiplexers, Semiconducting wafers, Astronomy, Superconductors, Temperature metrology, Telescopes

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Proceedings Article | 13 September 2012 Paper

Paper

A minimalist operating mode for UKIRT

Tom Kerr, Gary Davis, Simon Craig, Craig Walther, Tim Chuter

Proceedings Volume 8448, 84481G (2012) https://doi.org/10.1117/12.924864

KEYWORDS: Telescopes, Observatories, Infrared telescopes, Astronomy, Astronomical telescopes, Cameras, Space telescopes, Domes, Infrared radiation, Inspection

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Proceedings Article | 19 July 2010 Paper

Paper

Integration of SCUBA-2 within the JCMT Observatory Control System

Craig Walther, Xiaofeng Gao, Dennis Kelly, Russell Kackley, Tim Jenness

Proceedings Volume 7740, 77400Y (2010) https://doi.org/10.1117/12.857879

KEYWORDS: Computing systems, Control systems, Data acquisition, Observatories, Telescopes, Data archive systems, Astronomy, Data communications, Software development, Data processing

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Proceedings Article | 15 July 2010 Paper

Paper

Characterising the SCUBA-2 superconducting bolometer arrays

Dan Bintley, Michael MacIntosh, Wayne Holland, Per Friberg, Craig Walther, David Atkinson, Dennis Kelly, Xiaofeng Gao, Peter A. Ade, William Grainger, Julian House, Lorenzo Moncelsi, Matthew Hollister, Adam Woodcraft, Camelia Dunare, William Parkes, Anthony Walton, Kent Irwin, Gene Hilton, Michael Niemack, Carl Reintsema, Mandana Amiri, Bryce Burger, Mark Halpern, Matthew Hasselfield, Jeff Hill, J. Kycia, C. G. Mugford, Lauren Persaud

Proceedings Volume 7741, 774106 (2010) https://doi.org/10.1117/12.856839

KEYWORDS: Sensors, Multiplexers, Semiconducting wafers, Superconductors, Bolometers, Technetium, Astronomy, Telescopes, Calibration, Clocks

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Proceedings Article | 18 July 2008 Paper

Paper

HARP: a submillimetre heterodyne array receiver operating on the James Clerk Maxwell Telescope

H. Smith, J. Buckle, R. Hills, G. Bell, J. Richer, E. Curtis, S. Withington, J. Leech, R. Williamson, W. Dent, P. Hastings, R. Redman, B. Wooff, K. Yeung, P. Friberg, C. Walther, R. Kackley, T. Jenness, R. Tilanus, J. Dempsey, M. Kroug, T. Zijlstra, T. Klapwijk

Proceedings Volume 7020, 70200Z (2008) https://doi.org/10.1117/12.790707

KEYWORDS: Calibration, Control systems, Receivers, Sensors, Mirrors, Imaging systems, Astronomy, Heterodyning, Staring arrays, Telescopes

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Proceedings Article | 15 September 2004 Paper

Paper

The JCMT observing queue and recipe sequencer

Russell Kackley, Nicholas Rees, Craig Walther, Tim Jenness

Proceedings Volume 5496, (2004) https://doi.org/10.1117/12.550646

KEYWORDS: Telescopes, Calibration, Control systems, Human-machine interfaces, Astronomical telescopes, Databases, Observatories, Receivers, Switches, Switching

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Proceedings Article | 13 December 2002 Paper

Paper

JCMT observatory control system

Nicholas Rees, Frossie Economou, Tim Jenness, Russell Kackley, Craig Walther, William Dent, Martin Folger, Xiaofeng Gao, Dennis Kelly, John Lightfoot, Ian Pain, Gary Hovey, Russell Redman

Proceedings Volume 4848, (2002) https://doi.org/10.1117/12.461306

KEYWORDS: Telescopes, Control systems, Observatories, Interfaces, Data acquisition, Heterodyning, Calibration, Infrared telescopes, Raster graphics, Infrared radiation

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Showing 5 of 29 publications

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