Dr. John T. Woodward Profile

Dr. John T. Woodward

Research Physicist at National Institute of Standards and Technology

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 13 December 2020 Poster

Poster

A new approach to the absolute spectrophotometric calibration of standard stars: Vega and Sirius

Susana Deustua, John Woodward, Joseph Rice, Steven Brown, Stephen Maxwell, Florian Kerber, Alain Smette, Ralph Bohlin, Clarence Zarobila, Thinh Bui, Steven Grantham

Proceedings Volume 11445, 114453A (2020) https://doi.org/10.1117/12.2562046

KEYWORDS: Stars, Calibration, Spectral calibration, Astrophysics, Galactic astronomy, Astronomy, Large telescopes, Visible radiation, Near infrared, Environmental monitoring

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Testing of the LSST's photometric calibration strategy at the CTIO 0.9 meter telescope

Michael Coughlin, Susana Deustua, Augustin Guyonnet, Nicholas Mondrik, Joseph Rice, Christopher Stubbs, John Woodward

Proceedings Volume 10704, 1070420 (2018) https://doi.org/10.1117/12.2309582

KEYWORDS: Telescopes, Calibration, Optical filters, Large Synoptic Survey Telescope, Collimation, Projection systems, Atmospheric optics, Stars, Atmospheric modeling, Surface conduction electron emitter displays

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Proceedings Article | 1 September 2015 Paper

Paper

Comparison of MODTRAN5 atmospheric extinction predictions with narrowband astronomical flux observations

Christopher Stubbs, Amali Vaz, Gerald Fraser, Claire Cramer, Keith Lykke, John Woodward

Proceedings Volume 9608, 96080R (2015) https://doi.org/10.1117/12.2188453

KEYWORDS: Atmospheric modeling, Atmospheric particles, Atmospheric optics, Signal attenuation, Aerosols, Ozone, Astronomy, Observatories, Rayleigh scattering, Stars

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Proceedings Article | 25 September 2014 Paper

Paper

Improved thermal-vacuum compatible flat plate radiometric source for system-level testing of optical sensors

Mark Schwarz, Craig Kent, Steven Brown, John Woodward, Chungsan Lin

Proceedings Volume 9218, 921810 (2014) https://doi.org/10.1117/12.2061026

KEYWORDS: Diffusers, Sensors, Radiometry, Calibration, Optical sensors, Optical testing, Standards development, Liquids, Nitrogen, Fiber optic illuminators

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Proceedings Article | 19 September 2013 Paper

Paper

A novel apparatus to measure reflected sunlight from the Moon

Claire Cramer, Gerald Fraser, Keith Lykke, Allan Smith, John Woodward

Proceedings Volume 8867, 88670W (2013) https://doi.org/10.1117/12.2027204

KEYWORDS: Calibration, Telescopes, Satellites, Head, Lamps, Integrating spheres, Observatories, Sensors, Climatology, Meteorological satellites

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Proceedings Article | 17 September 2012 Paper

Paper

New instruments to calibrate atmospheric transmission

Peter Zimmer, John McGraw, Daniel Zirzow, Claire Cramer, Keith Lykke, John Woodward

Proceedings Volume 8444, 84441L (2012) https://doi.org/10.1117/12.926609

KEYWORDS: Calibration, Stars, Telescopes, Atmospheric modeling, Earth's atmosphere, LIDAR, Spectral calibration, Sensors, Receivers, Spectrophotometry

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Proceedings Article | 13 September 2012 Paper

Paper

Tunable laser techniques for improving the precision of observational astronomy

Claire Cramer, Steven Brown, Keith Lykke, John Woodward, Stephen Bailey, David Schlegel, Adam Bolton, Joel Brownstein, Peter Doherty, Christopher Stubbs, Amali Vaz, Andrew Szentgyorgyi

Proceedings Volume 8450, 84500S (2012) https://doi.org/10.1117/12.925198

KEYWORDS: Calibration, Tunable lasers, Sensors, Spectrographs, Point spread functions, Telescopes, Astronomy, Spectral calibration, Laser applications, Space telescopes

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Proceedings Article | 13 September 2012 Paper

Paper

Near-field calibration of an objective spectrophotometer to NIST radiometric standards for the creation and maintenance of standard stars for ground- and space-based applications

John McGraw, Peter Zimmer, Daniel Zirzow, John Woodward, Keith Lykke, Claire Cramer, Susana Deustua, Dean Hines

Proceedings Volume 8450, 84501S (2012) https://doi.org/10.1117/12.927296

KEYWORDS: Calibration, Sensors, Stars, Telescopes, Spectral resolution, Charge-coupled devices, Collimators, Optical filters, Near field, Spectral calibration

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Proceedings Article | 10 August 2010 Paper

Paper

Spectroradiometric calibration of telescopes using laser illumination of flat field screens

John Woodward, Steven Brown, Keith Lykke, Allan Smith, Claire Cramer, Peter Doherty, Emilio Falco, Christopher Stubbs

Proceedings Volume 7737, 77372A (2010) https://doi.org/10.1117/12.857474

KEYWORDS: Telescopes, Calibration, Optical filters, Charge-coupled devices, Photodiodes, Image filtering, Spectral calibration, Domes, Camera shutters, LabVIEW

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Proceedings Article | 22 July 2010 Paper

Paper

Ground-based observatory operations optimized and enhanced by direct atmospheric measurements

John McGraw, Peter Zimmer, Mark Ackermann, Dean Hines, Anthony Hull, Lisa Rossmann, Daniel Zirzow, Steven Brown, Gerald Fraser, Keith Lykke, Allan Smith, Christopher Stubbs, John Woodward

Proceedings Volume 7739, 773929 (2010) https://doi.org/10.1117/12.857787

KEYWORDS: Telescopes, Astronomy, Earth's atmosphere, LIDAR, Observatories, Calibration, Space telescopes, Stars, Atmospheric modeling, Focus stacking software

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Proceedings Article | 21 July 2010 Paper

Paper

Space-based photometric precision from ground-based telescopes

Peter Zimmer, John Mcgraw, Mark Ackermann, Dean Hines, Anthony Hull, Lisa Rossmann, Daniel Zirzow, Steven Brown, Claire Cramer, Gerald Fraser, Keith Lykke, Allan Smith, Christopher Stubbs, John Woodward

Proceedings Volume 7735, 77358D (2010) https://doi.org/10.1117/12.857700

KEYWORDS: Calibration, Telescopes, Stars, Aerosols, Atmospheric particles, Atmospheric modeling, LIDAR, Clouds, Absorption, Scattering

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Proceedings Article | 24 September 2009 Paper

Paper

A vacuum-compatible flat plate radiometric source for system-level testing of optical sensors

Steven Brown, Allan Smith, John Woodward, Keith Lykke, Bruce Guenther, Robert Lambeck, Robert Barnes

Proceedings Volume 7474, 747412 (2009) https://doi.org/10.1117/12.829892

KEYWORDS: Calibration, Sensors, Lamps, Temperature metrology, Radiometry, Optical fibers, Data acquisition, Transmittance, Phase modulation, Remote sensing

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Proceedings Article | 4 September 2009 Paper

Paper

A proposed global atmospheric monitoring network based on standard stars

John McGraw, Peter Zimmer, Steven Brown, Gerald Fraser, Keith Lykke, Allan Smith, Christopher Stubbs, John Woodward

Proceedings Volume 7453, 74530K (2009) https://doi.org/10.1117/12.831213

KEYWORDS: Stars, Calibration, Earth's atmosphere, Atmospheric modeling, Telescopes, Climate change, Atmospheric particles, Spectrophotometry, Atmospheric monitoring, Absorption

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Proceedings Article | 3 April 2008 Paper

Paper

Characterization of the latent image to developed image in model EUV photoresists

John Woodward, Kwang-Woo Choi, Vivek Prabhu, Shuhui Kang, Kristopher Lavery, Wen-li Wu, Michael Leeson, Anuja De Silva, Nelson Felix, Christopher Ober

Proceedings Volume 6923, 69232B (2008) https://doi.org/10.1117/12.773036

KEYWORDS: Line width roughness, Magnesium, Extreme ultraviolet lithography, Atomic force microscopy, Extreme ultraviolet, Photoresist materials, Image processing, Switches, Image quality, Photoresist developing

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Proceedings Article | 12 April 2007 Paper

Paper

Effect of photo-acid generator concentration and developer strength on the patterning capabilities of a model EUV photoresist

Kwang-Woo Choi, Vivek Prabhu, Kristopher Lavery, Eric Lin, Wen-li Wu, John Woodward, Michael Leeson, Heidi Cao, Manish Chandhok, George Thompson

Proceedings Volume 6519, 651943 (2007) https://doi.org/10.1117/12.712407

KEYWORDS: Photoresist materials, Line width roughness, Extreme ultraviolet lithography, Photoresist developing, Extreme ultraviolet, Optical lithography, Scanning electron microscopy, Standards development, Systems modeling, Performance modeling

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Proceedings Article | 21 March 2007 Paper

Paper

Component segregation in model chemically amplified resists

John Woodward, Theodore Fedynyshyn, David Astolfi, Susan Cann, Jeanette Roberts, Michael Leeson

Proceedings Volume 6519, 651915 (2007) https://doi.org/10.1117/12.711152

KEYWORDS: Atomic force microscopy, Polymers, Line edge roughness, Microscopy, Lithography, Chemically amplified resists, Surface roughness, Extreme ultraviolet, Extreme ultraviolet lithography, Profiling

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Showing 5 of 16 publications

Conference Committee Involvement (1)

Earth Observing Missions and Sensors: Development, Implementation, and Characterization V

25 September 2018 | Honolulu, Hawaii, United States

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