Mr. William H. Atkins Profile

William H. Atkins

at Los Alamos National Lab

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Author

Publications (7)

Proceedings Article | 7 January 2004 Paper

LANL MTI calibration team experience

Steven Bender, William Atkins, William Clodius, Cynthia Little, R. Wynn Christensen

Proceedings Volume 5159, (2004) https://doi.org/10.1117/12.509774

KEYWORDS: Calibration, Reflectivity, Sensors, Thermography, Lamps, Staring arrays, Algorithm development, Radiometry, Mirrors, Data modeling

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Proceedings Article | 20 August 2001 Paper

MTI science, data products, and ground-data processing overview

John Szymanski, William Atkins, Lee Balick, Christoph Borel, William Clodius, R. Wynn Christensen, Anthony Davis, J. Echohawk, Amy Galbraith, Karen Hirsch, James Krone, Cynthia Little, Peter McLachlan, Aaron Morrison, Kimberly Pollock, Paul Pope, Curtis Novak, Keri Ramsey, Emily Riddle, Charles Rohde, Diane Roussel-Dupre, Barham Smith, Kathy Smith, Kim Starkovich, James Theiler, Paul Weber

Proceedings Volume 4381, (2001) https://doi.org/10.1117/12.437009

KEYWORDS: Calibration, Clouds, Satellites, Atmospheric modeling, Data processing, Thermography, Algorithm development, Multispectral imaging, Data modeling, Vegetation

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Proceedings Article | 15 November 2000 Paper

Initial MTI on-orbit calibration performance

William Clodius, Steven Bender, William Atkins, R. Wynn Christensen, Cynthia Little, R. Rex Kay, David Bridenstine

Proceedings Volume 4132, (2000) https://doi.org/10.1117/12.406598

KEYWORDS: Calibration, Sensors, Thermography, Lamps, Imaging systems, Infrared radiation, Satellites, Multispectral imaging, Infrared imaging, Radiometry

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Proceedings Article | 15 November 2000 Paper

Thermal-infrared scale verifications at 10 um using the NIST EOS TXR

Joseph Rice, Steven Bender, William Atkins

Proceedings Volume 4135, (2000) https://doi.org/10.1117/12.494211

KEYWORDS: Calibration, Data modeling, Temperature metrology, Black bodies, Sensors, Reflectivity, Mirrors, Radiometry, Data conversion, Standards development

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Proceedings Article | 27 October 1999 Paper

MTI on-orbit calibration

William Clodius, Steven Bender, R. Rex Kay, Barham Smith, William Atkins, R. Wynn Christensen, Cynthia Little, Edward Zalewski, William Rappoport

Proceedings Volume 3753, (1999) https://doi.org/10.1117/12.366300

KEYWORDS: Calibration, Sensors, Imaging systems, Black bodies, Thermography, Infrared imaging, Infrared radiation, Electronics, Lamps, Radio optics

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Proceedings Article | 20 October 1998 Paper

Vacuum-compatible standard diffuse source, manufacture, and calibration

Donald Byrd, William Atkins, Steven Bender, R. Wynn Christensen, Francis Michaud

Proceedings Volume 3428, (1998) https://doi.org/10.1117/12.327962

KEYWORDS: Calibration, Optical spheres, Lamps, Integrating spheres, Satellites, Nitrogen, Sensors, Manufacturing, Spectral calibration, Silicon

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Los Alamos National Laboratories has completed the design, manufacture and calibration of a vacuum-compatible, tungsten lamp, integrating sphere. The light source has been calibrated at the National Institute of Standards and Technology and is intended for use as a calibration standard for remote sensing instrumentation. Calibration 2(sigma) uncertainty varied with wavelength from 1.21% at 400 nm and 0.73% at 900 nm, to 3.95% at 2400 nm. The inner radius of the Spectralon-coated sphere is 21.2 cm with a 7.4 cm square exit aperture. A small satellite sphere is attached to the main sphere and its output coupled through a stepper motor driven aperture. The variable aperture allows a constant radiance without effecting the color temperature output from the main sphere. The sphere's output is transmitted into a vacuum test environment through a fused silica window that is an integral part of the outer housing of the vacuum shell assembly. The atmosphere within this outer housing is composed of 240 degree(s)K nitrogen gas, provided by a custom LN₂ vaporizer unit. Use of the nitrogen gas maintains the internal temperature of the sphere at a nominal 300 degree(s)K +/- 10 degree(s). The calibrated spectral range of the source is 0.4 micrometers through 2.4 micrometers . Three, color temperature matched, 20 W bulbs together with a 10 W bulb are within the main integrating sphere. Two 20 W bulbs, also color temperature matched, reside in the satellite integrating sphere. A silicon and a germanium broadband detector are situated within the inner surface of the main sphere. Their purpose is for the measurement of the internal broadband irradiance. A fiber-optic-coupled spectrometer measures the internal color temperature that is maintained by current control on the lamps. Each lamp is independently operated allowing for radiances with common color temperatures ranging from near 0.026 W/cm²/sr to about 0.1 W/cm²/sr at a wavelength of 0.9 micrometers (the location of the peak spectral radiance).

Proceedings Article | 10 June 1996 Paper

Design, manufacture, and calibration of infrared radiometric blackbody sources

Donald Byrd, Francis Michaud, Steven Bender, A. Luettgen, Redus Holland, William Atkins, Thomas O'Brian, Steven Lorentz

Proceedings Volume 2743, (1996) https://doi.org/10.1117/12.241963

KEYWORDS: Black bodies, Sensors, Calibration, Lead, Infrared radiation, Liquids, Cryogenics, Control systems, Design for manufacturability, Manufacturing

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