Dr. Eliel Villa-Aleman Profile

Dr. Eliel Villa-Aleman

Laboratory Fellow at Savannah River National Lab

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Author

Publications (20)

Proceedings Article | 7 June 2024 Presentation + Paper

Monitoring the reaction dynamics of UF6 by cryogenic layering and FTIR spectroscopy

Louis McNamara, Abigail Waldron, John Kelly, Samuel Uba, Eliel Villa-Aleman, K. Alicia Strange Fessler

Proceedings Volume 13056, 130560R (2024) https://doi.org/10.1117/12.3013311

KEYWORDS: FT-IR spectroscopy, Uranium, Cryogenics, Spectroscopy, Vacuum

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Proceedings Article | 7 June 2024 Presentation + Paper

Development of spectroscopic tools for nuclear forensics signatures development

Eliel Villa-Aleman, Jason Darvin, Don Dick, Bryan Foley, Thomas Shehee, Ashlee Swindle, Emily Kwapis, Kyle Hartig

Proceedings Volume 13056, 130560P (2024) https://doi.org/10.1117/12.3014316

KEYWORDS: Plutonium, Raman spectroscopy, Spectroscopy, Infrared spectroscopy, Laser induced breakdown spectroscopy, Diffuse reflectance spectroscopy, Forensic science

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Proceedings Article | 22 April 2009 Paper

Measurement of wind speed from cooling lake thermal imagery

Alfred Garrett, R. Cary Tuckfield, Eliel Villa-Aleman, Robert Kurzeja, Malcolm Pendergast

Proceedings Volume 7299, 72990A (2009) https://doi.org/10.1117/12.817755

KEYWORDS: Infrared imaging, Wind measurement, Temperature metrology, Thermography, Heat flux, Data modeling, Statistical analysis, Convection, Statistical modeling, Thermal modeling

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Proceedings Article | 4 September 2008 Paper

AFM characterization of laser-induced damage on CdZnTe crystal surfaces

Samantha Hawkins, Lucile Teague, Eliel Villa-Aleman, Martine Duff, Arnold Burger, Michael Groza, Vladimir Buliga

Proceedings Volume 7079, 70790R (2008) https://doi.org/10.1117/12.798574

KEYWORDS: Crystals, Tellurium, Atomic force microscopy, Raman spectroscopy, Laser crystals, Cadmium, Laser induced damage, Sensors, Surface finishing, Gamma radiation

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Proceedings Article | 17 March 2008 Paper

Direct measurement of heat flux from cooling lake thermal imagery

Alfred Garrett, Eliel Villa-Aleman, Robert Kurzeja, Malcolm Pendergast

Proceedings Volume 6939, 69390T (2008) https://doi.org/10.1117/12.768102

KEYWORDS: Thermography, Heat flux, Cameras, Linear filtering, Convection, Temperature metrology, Infrared cameras, Wind energy, Turbulence, Thermal effects

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Proceedings Article | 17 March 2008 Paper

Aerial measurements of convection cell elements in heated lakes

E. Villa-Aleman, S. Salaymeh, T. Brown, A. Garrett, L. Nichols, M. Pendergast

Proceedings Volume 6939, 69390S (2008) https://doi.org/10.1117/12.778367

KEYWORDS: Convection, Infrared radiation, Infrared imaging, Heat flux, Cameras, Infrared cameras, Temperature metrology, Skin, Thermography, Forward looking infrared

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Proceedings Article | 7 May 2007 Paper

Radiometric modeling of cavernous targets to assist in the determination of absolute temperature for input to process models

Matthew Montanaro, Carl Salvaggio, Scott Brown, David Messinger, Adam Goodenough, Alfred Garrett, Eliel Villa-Aleman

Proceedings Volume 6565, 656511 (2007) https://doi.org/10.1117/12.718666

KEYWORDS: Bidirectional reflectance transmission function, Reflection, Reflectivity, Process modeling, Sensors, Black bodies, Infrared imaging, Solid modeling, Digital imaging, 3D modeling

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Determining the temperature of an internal surface within cavernous targets, such as the interior wall of a mechanical draft cooling tower, from remotely sensed imagery is important for many surveillance applications that provide input to process models. The surface leaving radiance from an observed target is a combination of the self-emitted radiance and the reflected background radiance. The self-emitted radiance component is a function of the temperature-dependent blackbody radiation and the view-dependent directional emissivity. The reflected background radiance component depends on the bidirectional reflectance distribution function (BRDF) of the surface, the incident radiance from surrounding sources, and the BRDF for each of these background sources. Inside a cavity, the background radiance emanating from any of the multiple internal surfaces will be a combination of the self-emitted and reflected energy from the other internal surfaces as well as the downwelling sky radiance. This scenario provides for a complex radiometric inversion problem in order to arrive at the absolute temperature of any of these internal surfaces. The cavernous target has often been assumed to be a blackbody, but in field experiments it has been determined that this assumption does not always provide an accurate surface temperature. The Digital Imaging and Remote Sensing Image Generation (DIRSIG) modeling tool is being used to represent a cavity target. The model demonstrates the dependence of the radiance reaching the sensor on the emissivity of the internal surfaces and the multiple internal interactions between all the surfaces that make up the overall target. The cavity model is extended to a detailed model of a mechanical draft cooling tower. The predictions of derived temperature from this model are compared to those derived from actual infrared imagery collected with a helicopter-based broadband infrared imaging system collected over an operating tower located at the Savannah River National Laboratory site.

Proceedings Article | 7 December 2004 Paper

Isotopic hydrogen analysis via conventional and surface-enhanced fiber optic Raman spectroscopy

Robert Lascola, Kristine Zeigler, C. Scott McWhorter, Eliel Villa-Aleman, Laura Tovo, April Ward

Proceedings Volume 5586, (2004) https://doi.org/10.1117/12.571898

KEYWORDS: Raman spectroscopy, Surface enhanced Raman spectroscopy, Hydrogen, Raman scattering, Fiber optics, Silver, Scattering, Chemical analysis, Palladium, Metals

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Proceedings Article | 23 September 2003 Paper

Assessment of Ivanpah Playa as a site for thermal vicarious calibration for the MTI satellite

Eliel Villa-Aleman, Robert Kurzeja, Malcolm Pendergast

Proceedings Volume 5093, (2003) https://doi.org/10.1117/12.485801

KEYWORDS: Calibration, Satellites, FT-IR spectroscopy, Temperature metrology, Spectroscopy, Soil science, Reflectivity, Sensors, Black bodies, Visible radiation

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Proceedings Article | 23 September 2003 Paper

Temporal, spatial, and spectral variability at the Ivanpah Playa vicarious calibration site

Eliel Villa-Aleman, Robert Kurzeja, Malcolm Pendergast

Proceedings Volume 5093, (2003) https://doi.org/10.1117/12.486960

KEYWORDS: Reflectivity, Calibration, Satellites, Quartz, Spectroscopy, FT-IR spectroscopy, Satellite imaging, Lanthanum, Black bodies, Thermography

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Proceedings Article | 1 April 2003 Paper

Temperature and emissivity measurements with the Multispectral Thermal Imager satellite at Ivanpah Playa

Eliel Villa-Aleman

Proceedings Volume 5073, (2003) https://doi.org/10.1117/12.485807

KEYWORDS: Calibration, FT-IR spectroscopy, Satellites, Temperature metrology, Spectroscopy, Black bodies, Soil science, Thermography, Reflectivity, Satellite imaging

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Proceedings Article | 15 March 2002 Paper

Performance analysis of conical cavities for surface temperature retrieval with a Fourier transform infrared spectrometer

Eliel Villa-Aleman

Proceedings Volume 4710, (2002) https://doi.org/10.1117/12.459573

KEYWORDS: Temperature metrology, FT-IR spectroscopy, Spectroscopy, Aluminum, Black bodies, Radiometry, Infrared spectroscopy, Metals, Calibration, Infrared cameras

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Proceedings Article | 17 January 2002 Paper

Comparison of MTI satellite-derived surface water temperatures and in-situ measurements

Robert Kurzeja, Malcolm Pendergast, Eliel Villa-Aleman, Alfred Garrett

Proceedings Volume 4480, (2002) https://doi.org/10.1117/12.453350

KEYWORDS: Temperature metrology, Skin, Satellites, Calibration, Infrared imaging, Thermography, Sensors, Sun, Photometry, Radiometry

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Proceedings Article | 17 January 2002 Paper

MTI thermal bands calibration at Ivanpah Playa with a Fourier transform infrared spectrometer

Eliel Villa-Aleman, Robert Kurzeja, Malcolm Pendergast

Proceedings Volume 4480, (2002) https://doi.org/10.1117/12.453352

KEYWORDS: Calibration, FT-IR spectroscopy, Spectroscopy, Satellites, Temperature metrology, Soil science, Black bodies, Thermography, Infrared spectroscopy, Infrared radiation

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Proceedings Article | 18 September 2001 Paper

Use of natural bodies of water for IR calibration targets

Robert Kurzeja, Malcolm Pendergast, Eliel Villa-Aleman, Alfred Garrett

Proceedings Volume 4370, (2001) https://doi.org/10.1117/12.440072

KEYWORDS: Temperature metrology, Radiometry, Skin, Thermography, Calibration, Infrared radiation, Infrared sensors, Humidity, Infrared imaging, Sensors

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Proceedings Article | 20 August 2001 Paper

Observations and model predictions of water skin temperatures at MTI core site lakes and reservoirs

Alfred Garrett, Robert Kurzeja, Byron O'Steen, Matthew Parker, Malcolm Pendergast, Eliel Villa-Aleman, Mary Pagnutti

Proceedings Volume 4381, (2001) https://doi.org/10.1117/12.437012

KEYWORDS: Temperature metrology, Skin, Astatine, Solar radiation models, Data modeling, 3D modeling, Thermography, Atmospheric modeling, Radiometry, Wind energy

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Proceedings Article | 20 August 2001 Paper

Ground-truth collections at the MTI core sites

Alfred Garrett, Robert Kurzeja, Matthew Parker, Byron O'Steen, Malcolm Pendergast, Eliel Villa-Aleman

Proceedings Volume 4381, (2001) https://doi.org/10.1117/12.437032

KEYWORDS: Temperature metrology, Skin, Reflectivity, Calibration, Meteorology, Algorithm development, FT-IR spectroscopy, Data centers, Databases, Thermography

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Proceedings Article | 23 March 2001 Paper

Thermal targets for satellite calibration

Eliel Villa-Aleman, Alfred Garrett, Robert Kurzeja, Byron O'Steen, Malcolm Pendergast

Proceedings Volume 4360, (2001) https://doi.org/10.1117/12.421021

KEYWORDS: Satellites, Temperature metrology, Calibration, Thermography, Skin, Radiometry, Satellite imaging, Black bodies, Infrared imaging, Infrared radiation

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Proceedings Article | 30 March 2000 Paper

Aerial thermography studies of power plant heated lakes

Eliel Villa-Aleman, Alfred Garrett, Robert Kurzeja, Malcolm Pendergast

Proceedings Volume 4020, (2000) https://doi.org/10.1117/12.381571

KEYWORDS: Temperature metrology, Skin, Thermography, Radiometry, Satellites, Thermal modeling, Calibration, Infrared cameras, 3D modeling, Data modeling

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Proceedings Article | 27 October 1999 Paper

Post-launch validation of Multispectral Thermal Imager (MTI) data and algorithms

Alfred Garrett, Robert Kurzeja, Byron O'Steen, Matthew Parker, Malcolm Pendergast, Eliel Villa-Aleman

Proceedings Volume 3753, (1999) https://doi.org/10.1117/12.366305

KEYWORDS: Temperature metrology, Skin, Detection and tracking algorithms, Radiometry, Atmospheric modeling, Algorithm development, Atmospheric particles, Reflectivity, Satellites, Calibration

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Showing 5 of 20 publications

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