Dr. Héctor Erives-Contreras Profile

Dr. Héctor Erives-Contreras

Associate Professor of Practice at Univ of Texas El Paso

SPIE Involvement:

Author | Science Fair Judge

Publications (14)

Proceedings Article | 13 June 2023 Presentation + Paper

Preliminary study of the characterization of a geosynchronous satellite with glint season observations from a small aperture telescope and synthetic imagery

Héctor Erives-Contreras, Francis Chun, Miguel Velez-Reyes, David Strong, Arizbe Najera

Proceedings Volume 12519, 1251906 (2023) https://doi.org/10.1117/12.2665088

KEYWORDS: Satellites, Telescopes, Satellite imaging, Device simulation, Solar cells, Calibration, Reflection, Atmospheric modeling, Earth observing sensors, Air force

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Proceedings Article | 13 June 2023 Presentation + Paper

Simulating ground-based measurements of spectral signatures of resident space objects

Aryzbe Najera, Miguel Velez-Reyes, Hector Erives-Contreras, Dan DeBlasio

Proceedings Volume 12519, 1251908 (2023) https://doi.org/10.1117/12.2665188

KEYWORDS: Satellites, Algorithm development, Space operations, Remote sensing, Space telescopes, Photometry, Hyperspectral sensing, Multispectral sensing, Scene simulation

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Proceedings Article | 30 May 2022 Presentation

Using simulation models to study multi/hyperspectral remote sensing of unresolved resident space objects

Aryzbe Najera, Hector Erives, Miguel Velez-Reyes, Laura Hernandez-Torres

Proceedings Volume PC12094, PC1209404 (2022) https://doi.org/10.1117/12.2622785

KEYWORDS: Remote sensing, Data modeling, Computer simulations, Algorithm development, Spectral resolution, Situational awareness sensors, Sensors, Optical telescopes, MATLAB, Knowledge management

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Proceedings Article | 12 February 2008 Paper

Implementation of a VIS/NIR 3D hyperspectral instrument for in vivo imaging

Hector Erives, Scott Teare, Nicholas Targhetta

Proceedings Volume 6850, 68500O (2008) https://doi.org/10.1117/12.760552

KEYWORDS: Hyperspectral imaging, Calibration, Cameras, Skin, 3D image processing, Reflectivity, 3D metrology, In vivo imaging, Image registration, Hyperspectral systems

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Proceedings Article | 22 August 2005 Paper

Performance of MODIS solar diffuser and solar diffuser stability monitor

X. Xiong, H. Erives, S. Xiong, X. Xie, J. Esposito, J. Sun, W. Barnes

Proceedings Volume 5882, 58820S (2005) https://doi.org/10.1117/12.615334

KEYWORDS: MODIS, Calibration, Sensors, Diffusers, Sun, Reflectivity, Near infrared, Radiometry, Mirrors, Imaging systems

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The Moderate Resolution Imaging Spectroradiometer (MODIS) reflective solar bands (RSB) cover wavelengths from 0.41 to 2.2μm. They are calibrated on-orbit by a solar diffuser (SD) panel, made of space-grade Spectralon. During each SD calibration a solar diffuser stability monitor (SDSM) is operated concurrently to track the changes of the SD bidirectional reflectance factor (BRF). The SDSM views alternately the sunlight (Sun View) through a fixed transmission screen and the sunlight diffusely reflected from the SD panel (SD view). A design error in the SDSM system, not discovered until post-launch, has caused significant ripples in the SDSM Sun view responses. Consequently an alternative normalization approach has been developed to remove the ripples in the SDSM Sun view responses and their impacts on the SD degradation analysis. This approach has been successfully used in the SDSM measurements on-orbit. In order to reduce the direct solar exposure onto the SD panel, the MODIS instrument was designed with a SD door that is normally commanded to an "open" position during SD/SDSM observations and to a "closed" position when the calibration is completed. For Terra MODIS launched in December 1999, an SD door related anomaly occurred in May 2003 that led to a decision to set the SD door permanently at the open position. This operational configuration has resulted in extra time of direct solar illumination on the SD plate and therefore a much faster SD degradation rate. In this paper we provide a brief description of the MODIS RSB calibration algorithm and the on-board SD and SDSM system used for the calibration. We examine the Terra MODIS SD degradation rate and its spectral dependency. The results from five years of SDSM observations are summarized in this paper and used to evaluate the SD on-orbit performance and its impact on the MODIS RSB calibration uncertainty. Prior to the SD door anomaly, the SD annual degradation rate was approximately 3% at 0.41μm, 2% at 0.47μm, and 1% at 0.53μm. After the SD door anomaly, the SD annual degradation rate has increased to 10% at 0.41μm, 7% at 0.47μm, and 4.5% at 0.53μm.

Proceedings Article | 9 November 2004 Paper

Automated registration of hyperspectral images

Hector Erives, Glenn Fitzgerald

Proceedings Volume 5544, (2004) https://doi.org/10.1117/12.555924

KEYWORDS: Image registration, Hyperspectral imaging, Imaging systems, Sensors, Optical filters, Agriculture, Cameras, Image filtering, Remote sensing, Transform theory

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Proceedings Article | 4 November 2004 Paper

Status of Aqua MODIS on-orbit calibration and characterization

Xiaoxiong Xiong, William Barnes, Kwofu Chiang, Hector Erives, Nianzeng Che, Junqiang Sun, Alice Isaacman, Vincent Salomonson

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.564940

KEYWORDS: MODIS, Calibration, Sensors, Mirrors, Reflectivity, Space operations, Detection and tracking algorithms, Electronics, Diffusers, Signal to noise ratio

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Proceedings Article | 4 November 2004 Paper

Terra MODIS RSB on-orbit calibration and performance: four years of data

Hector Erives, Xiaoxiong Xiong, Junqiang Sun, Joseph Esposito, Sanxiong Xiong, William Barnes

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565060

KEYWORDS: Calibration, MODIS, Sensors, Mirrors, Reflectivity, Diffusers, Sun, Electronics, Signal attenuation, Space operations

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Proceedings Article | 28 July 1997 Paper

Comparative analysis of two evolved neural networks used for the identification and control of a nonlinear plant

Hector Erives, Wiley Thompson

Proceedings Volume 3068, (1997) https://doi.org/10.1117/12.280816

KEYWORDS: Nonlinear control, Neural networks, Control systems, Neurons, Binary data, Genetic algorithms, Evolutionary algorithms, Genetics, Complex systems, System identification

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Proceedings Article | 23 July 1997 Paper

Chemical detection using the airborne thermal infrared imaging spectrometer (TIRIS)

Nahum Gat, Suresh Subramanian, Jacob Barhen, Michael Sheffield, Hector Erives

Proceedings Volume 3082, (1997) https://doi.org/10.1117/12.280926

KEYWORDS: Sensors, Absorption, Spectroscopy, Infrared spectroscopy, Infrared imaging, FT-IR spectroscopy, Infrared signatures, Infrared radiation, Chemical detection, Inverse problems

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Proceedings Article | 14 June 1996 Paper

Evolved radial basis function networks for identification and control of dynamical systems

Hector Erives, Wiley Thompson, Ramon Parra-Loera

Proceedings Volume 2755, (1996) https://doi.org/10.1117/12.243179

KEYWORDS: Evolutionary algorithms, Control systems, Dynamical systems, Nonlinear control, Complex systems, Computer programming, Neural networks, Genetic algorithms, Genetics, Stochastic processes

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Proceedings Article | 14 June 1996 Paper

Evolved functional neural networks for system identification

Hector Erives, Ramon Parra-Loera

Proceedings Volume 2755, (1996) https://doi.org/10.1117/12.243201

KEYWORDS: Neural networks, System identification, Genetic algorithms, Dynamical systems, Complex systems, Genetics, Evolutionary algorithms, Control systems, Analytical research, Artificial neural networks

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Proceedings Article | 14 June 1996 Paper

Genetic algorithms approach for the extraction of the polygonal approximation of planar objects

Hector Erives, Ramon Parra-Loera

Proceedings Volume 2755, (1996) https://doi.org/10.1117/12.243202

KEYWORDS: Genetic algorithms, Image segmentation, Genetics, Evolutionary algorithms, Gallium, Machine vision, Computer vision technology, Computer engineering, Algorithm development, Image filtering

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Proceedings Article | 3 September 1993 Paper

Robust fast model-based recognition of partially occluded objects using normalized interval vertex descriptors

Ramon Parra-Loera, Hector Erives, Wiley Thompson

Proceedings Volume 1955, (1993) https://doi.org/10.1117/12.154979

KEYWORDS: Model-based design, Process modeling, Image processing, Object recognition, Image segmentation, Image processing algorithms and systems, Binary data, Reconstruction algorithms, Classification systems, Clocks

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Showing 5 of 14 publications

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