Mr. John W. Cooper Profile

John W. Cooper

Retired at Hexagon US Federal

SPIE Involvement:

Author

Publications (14)

Proceedings Article | 30 September 2022 Paper

Comparison of lamp and detector-based integrating sphere radiance calibrations using the NASA GSFC Filter Radiometer Monitoring System (FRMS)

Elaine Lalanne, James Butler, Leibo Ding, John Cooper, Nathan Kelley

Proceedings Volume 12232, 1223201 (2022) https://doi.org/10.1117/12.2634056

KEYWORDS: Calibration, Sensors, Integrating spheres, Optical spheres, Radiometry, Optical parametric oscillators, Lamps, Satellites, Tunable lasers, Standards development

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Proceedings Article | 7 September 2018 Presentation + Paper

Characterizations of a KHz pulsed laser detection system

Leibo Ding, James Butler, Jinan Zeng, Elaine Lalanne, John Cooper

Proceedings Volume 10764, 1076407 (2018) https://doi.org/10.1117/12.2323349

KEYWORDS: Pulsed laser operation, Light sources, Calibration, Light emitting diodes, Tunable lasers

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Proceedings Article | 11 September 2015 Paper

Characterization and application of a LED-driven integrating sphere source

Leibo Ding, Elena Georgieva, James Butler, John Cooper, Georgi Georgiev, Gilbert Smith

Proceedings Volume 9607, 96070Y (2015) https://doi.org/10.1117/12.2191371

KEYWORDS: Light emitting diodes, Integrating spheres, Sensors, Light sources, Polarization, Amplifiers, Optical spheres, Interference (communication), Silicon, Tunable lasers

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Proceedings Article | 23 September 2013 Paper

Characterization of a radiometric monitoring system for NASA code 618's SIRCUS-G

Leibo Ding, John Cooper, Aboubakar Traore, Gilbert Smith, James Butler

Proceedings Volume 8866, 886614 (2013) https://doi.org/10.1117/12.2026982

KEYWORDS: Radiometry, Calibration, Indium gallium arsenide, Silicon, Phase modulation, Amplitude modulation, Sensors, Optical spheres, Laser systems engineering, Integrating spheres

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SPIE Journal Paper | 1 November 2011

Development and performance of a filter radiometer monitor system for integrating sphere sources

Leibo Ding, John Cooper, Gilbert Smith, Matthew Kowalewski, Robert Barnes, Eugene Waluschka, James Butler

OE, Vol. 50, Issue 11, 113603, (November 2011) https://doi.org/10.1117/12.10.1117/1.3646532

KEYWORDS: Sensors, Optical spheres, Phase modulation, Integrating spheres, Radiometry, Lamps, Calibration, Indium gallium arsenide, Optical filters, Silicon

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Proceedings Article | 14 October 2010 Paper

Characterization of a double monochromator

Leibo Ding, John Cooper, Matthew Kowalewski, Gilbert Smith, James Butler

Proceedings Volume 7826, 782624 (2010) https://doi.org/10.1117/12.865091

KEYWORDS: Sensors, Integrating spheres, Monochromators, Optical spheres, Mercury, Calibration, Radiometry, Stray light, Lamps, Ultraviolet radiation

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Proceedings Article | 21 August 2009 Paper

Development of a filter radiometer monitor system for integrating sphere sources

Leibo Ding, Matthew Kowalewski, John Cooper, Gilbert Smith, James Butler

Proceedings Volume 7452, 745206 (2009) https://doi.org/10.1117/12.827721

KEYWORDS: Phase modulation, Amplitude modulation, Sensors, Optical spheres, Integrating spheres, Lamps, Calibration, Radiometry, Silicon, Indium gallium arsenide

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Proceedings Article | 9 October 2008 Paper

Calibration of a radiance standard for the NPP/OMPS instrument

James Butler, Scott Janz, B. Carol Johnson, Robert Saunders, John Cooper, Matthew Kowalewski, Robert Barnes

Proceedings Volume 7106, 71060Z (2008) https://doi.org/10.1117/12.800194

KEYWORDS: Calibration, Optical spheres, Radiometry, Standards development, Remote sensing, Integrating spheres, Lamps, Aerospace engineering, Diffusers, Spectroscopy

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Proceedings Article | 7 September 2006 Paper

Bandwidth and spectral stray light effects in the NASA GSFC Radiometric Calibration Facility primary transfer radiometer

Robert Barnes, John Cooper, John Marketon, Steven Brown, B. Carol Johnson, James Butler

Proceedings Volume 6296, 629604 (2006) https://doi.org/10.1117/12.679493

KEYWORDS: Optical spheres, Signal detection, Radiometry, Stray light, Lamps, Calibration, Sensors, Scattering, Free electron lasers, Integrating spheres

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Proceedings Article | 4 November 2004 Paper

Radiometric characterization of the NASA GSFC radiometric calibration facility primary transfer radiometer

John Cooper, Steven Brown, Peter Abel, John Marketon, James Butler

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565623

KEYWORDS: Luminescence, Calibration, Radiometry, Optical spheres, Lamps, Sensors, Integrating spheres, Stray light, Silicon, Radio optics

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Proceedings Article | 4 November 2004 Paper

Characterization and performance of optical input systems for a calibration transfer spectroradiometer

John Marketon, John Cooper, Gilbert Smith

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565646

KEYWORDS: Calibration, Monochromators, Optical spheres, Stray light, Silicon, Indium gallium arsenide, Lamps, Free electron lasers, Spectral calibration, Sensors

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Proceedings Article | 8 April 2003 Paper

Integrating sphere source monitoring and stability data

John Marketon, Peter Abel, James Butler, Gilbert Smith, John Cooper

Proceedings Volume 4881, (2003) https://doi.org/10.1117/12.462589

KEYWORDS: Optical spheres, Integrating spheres, Calibration, Lamps, Sensors, Aluminum, Temperature metrology, Coating, Radiometry, Signal detection

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Proceedings Article | 9 February 2001 Paper

Filter radiometer monitoring system for integrating sphere sources

John Marketon, Peter Abel, James Butler, Gilbert Smith, John Cooper

Proceedings Volume 4169, (2001) https://doi.org/10.1117/12.417131

KEYWORDS: Optical spheres, Sensors, Calibration, Integrating spheres, Lamps, Reflectivity, Control systems, Radiometry, Computer programming, Absorption

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Proceedings Article | 28 December 1999 Paper

Radiometric measurement comparisons using transfer radiometers in support of the calibration of NASA's Earth Observing System (EOS) sensors

James Butler, B. Carol Johnson, Steven Brown, Howard Yoon, Robert Barnes, Brian Markham, Stuart Biggar, Edward Zalewski, Paul Spyak, John Cooper, Fumihiro Sakuma

Proceedings Volume 3870, (1999) https://doi.org/10.1117/12.373186

KEYWORDS: Radiometry, Optical spheres, Calibration, Integrating spheres, Short wave infrared radiation, Sensors, Satellites, Infrared radiation, Lamps, Remote sensing

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EOS satellite instruments operating in the visible through the shortwave infrared wavelength regions (from 0.4 micrometer to 2.5 micrometer) are calibrated prior to flight for radiance response using integrating spheres at a number of instrument builder facilities. The traceability of the radiance produced by these spheres with respect to international standards is the responsibility of the instrument builder, and different calibration techniques are employed by those builders. The National Aeronautics and Space Administration's (NASA's) Earth Observing System (EOS) Project Science Office, realizing the importance of preflight calibration and cross-calibration, has sponsored a number of radiometric measurement comparisons, the main purpose of which is to validate the radiometric scale assigned to the integrating spheres by the instrument builders. This paper describes the radiometric measurement comparisons, the use of stable transfer radiometers to perform the measurements, and the measurement approaches and protocols used to validate integrating sphere radiances. Stable transfer radiometers from the National Institute of Standards and Technology, the University of Arizona Optical Sciences Center Remote Sensing Group, NASA's Goddard Space Flight Center, and the National Research Laboratory of Metrology in Japan, have participated in these comparisons. The approaches used in the comparisons include the measurement of multiple integrating sphere lamp levels, repeat measurements of select lamp levels, the use of the stable radiometers as external sphere monitors, and the rapid reporting of measurement results. Results from several comparisons are presented. The absolute radiometric calibration standard uncertainties required by the EOS satellite instruments are typically in the plus or minus 3% to plus or minus 5% range. Preliminary results reported during eleven radiometric measurement comparisons held between February 1995 and May 1998 have shown the radiance of integrating spheres agreed to within plus or minus 2.5% from the average at blue wavelengths and to within plus or minus 1.7% from the average at red and near infrared wavelengths. This level of agreement lends confidence in the use of the transfer radiometers in validating the radiance scales assigned by EOS instrument calibration facilities to their integrating sphere sources.

Showing 5 of 14 publications

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