Dr. Georgi T. Georgiev Profile

Dr. Georgi T. Georgiev

at NASA Goddard Space Flight Ctr

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 20 November 2024 Poster + Paper

CLARREO Pathfinder solar diffuser pre-flight calibration

Georgi Georgiev, Julia Barsi, Nathan Kelley, Elena Georgieva, Yana Williams, Paul Smith, Anthony Barsic

Proceedings Volume 13192, 1319217 (2024) https://doi.org/10.1117/12.3034029

KEYWORDS: Calibration, Diffusers, Sensors, Bidirectional reflectance transmission function, Polarization, Photodiodes, Indium gallium arsenide, Imaging systems, Transmittance, Silicon

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Proceedings Article | 4 October 2023 Presentation + Paper

GSFC Calibration Laboratory capabilities and future plans overview

Nathan Kelley, Joel McCorkel, Erich Wanzek, Georgie Georgiev, Julia Barsi, Brendan McAndrew, Boryana Efremova

Proceedings Volume 12685, 126850B (2023) https://doi.org/10.1117/12.2681380

KEYWORDS: Calibration, Optical spheres, Lamps, Radiometry, Diffusers, Radiometric calibration, Equipment, Tunable lasers, Spectral calibration, Free electron lasers

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Proceedings Article | 10 October 2019 Presentation + Paper

The bidirectional reflectance of black silicon used in space and Earth remote sensing applications

Georgi Georgiev, James Butler, Ron Shiri, Christine Jhabvala, Edward Wollack, Elena Georgieva

Proceedings Volume 11151, 111511E (2019) https://doi.org/10.1117/12.2534799

KEYWORDS: Silicon, Reflectivity, Remote sensing, Coronagraphy, Calibration, Bidirectional reflectance transmission function, Optical testing, Light scattering, Exoplanets, Aerospace engineering

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Proceedings Article | 9 September 2019 Paper

Highly absorptive pupil mask fabricated with black silicon

Ron Shiri, Christine Jhabvala, Georgi Georgiev, Alyssa Barlis, Remi Soummer, Pete Petrone, Marc Kuchner, Edward Wollack, Michael Biskach, Timo Saha, Will Zhang, James Butler

Proceedings Volume 11116, 111161H (2019) https://doi.org/10.1117/12.2532567

KEYWORDS: Photomasks, Reactive ion etching, Etching, Silicon, Reflectivity, Cryogenics, Semiconducting wafers, Bidirectional reflectance transmission function, Exoplanets, Coronagraphy

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Proceedings Article | 7 September 2018 Presentation + Paper

Radiometric calibration discrepancy and root cause analysis for radiation budget instrument

Yana Williams, Mohan Shankar, Loren Woody, Richard Hertel, Joe Predina, Hyung Lee, Georgi Georgiev, Cindy Young, Christopher Randall, Kory Priestley

Proceedings Volume 10764, 107640T (2018) https://doi.org/10.1117/12.2326032

KEYWORDS: Calibration, Sensors, Telescopes, Optical filters, Indium gallium arsenide, Infrared radiation, Signal detection, Radiometric corrections, Uncertainty analysis, Earth's atmosphere

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Proceedings Article | 5 September 2017 Presentation + Paper

Establishing BRDF calibration capabilities through shortwave infrared

Georgi Georgiev, James Butler, Kurt Thome, Catherine Cooksey, Leibo Ding

Proceedings Volume 10402, 104021N (2017) https://doi.org/10.1117/12.2273007

KEYWORDS: Bidirectional reflectance transmission function, Calibration, Short wave infrared radiation, Reflectivity, Diffusers, Remote sensing, Shortwaves, Infrared radiation, Satellites, Data modeling

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Proceedings Article | 11 October 2016 Paper

Goniometric and hemispherical reflectance and transmittance measurements of fused silica diffusers

Paul Lemaillet, Heather Patrick, Thomas Germer, Leonard Hanssen, B. Carol Johnson, Georgi Georgiev

Proceedings Volume 9961, 996109 (2016) https://doi.org/10.1117/12.2237975

KEYWORDS: IRIS Consortium, Diffusers, Reflectivity, Transmittance, Silica, Scattering, Bidirectional reflectance transmission function, Optical spheres, Sensors, Integrating spheres

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Proceedings Article | 19 September 2016 Presentation + Paper

Preliminary results of BTDF calibration of transmissive solar diffusers for remote sensing

Georgi Georgiev, James Butler, Kurt Thome, Catherine Cooksey, Leibo Ding

Proceedings Volume 9972, 997205 (2016) https://doi.org/10.1117/12.2235802

KEYWORDS: Diffusers, Calibration, Bidirectional reflectance transmission function, Reflectivity, Satellites, Transmittance, Near infrared, Remote sensing, Sensors, Ultraviolet radiation

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Proceedings Article | 12 October 2015 Paper

Creation and validation of Spectralon PTFE BRDF targets and standards

Christopher Durell, Dan Scharpf, Greg McKee, Michelle L'Heureux, Georgi Georgiev, Gael Obein, Catherine Cooksey

Proceedings Volume 9639, 96391D (2015) https://doi.org/10.1117/12.2195503

KEYWORDS: Bidirectional reflectance transmission function, Reflectivity, Sensors, Calibration, Standards development, Tolerancing, Aerospace engineering, Reflectors, Diffusers, Optical benches

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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 | 9 November 2012 Paper

A new approach for spectroradiometric calibration consistency on the ground and in space

Donald Heath, Georgi Georgiev

Proceedings Volume 8528, 85280R (2012) https://doi.org/10.1117/12.977252

KEYWORDS: Reflectivity, Calibration, Transmittance, Spectral calibration, Bidirectional reflectance transmission function, Quartz, Glasses, Mie scattering, Diffusers, Opacity

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Proceedings Article | 9 May 2012 Paper

Linking goniometer measurements to hyperspectral and multisensor imagery for retrieval of beach properties and coastal characterization

Charles Bachmann, Deric Gray, Andrei Abelev, William Philpot, Marcos Montes, Robert Fusina, Joseph Musser, Rong-Rong Li, Michael Vermillion, Geoffrey Smith, Daniel Korwan, Charlotte Snow, W. David Miller, Joan Gardner, Mark Sletten, Georgi Georgiev, Barry Truitt, Marcus Killmon, Jon Sellars, Jason Woolard, Christopher Parrish, Art Schwarzscild

Proceedings Volume 8390, 83901D (2012) https://doi.org/10.1117/12.918464

KEYWORDS: Reflectivity, Bidirectional reflectance transmission function, Hyperspectral imaging, Synthetic aperture radar, Water, Minerals, Remote sensing, Short wave infrared radiation, Calibration, LIDAR

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Proceedings Article | 3 October 2011 Paper

SWIR calibration of Spectralon reflectance factor

Georgi Georgiev, James Butler, Catherine Cooksey, Leibo Ding, Kurtis Thome

Proceedings Volume 8176, 81760W (2011) https://doi.org/10.1117/12.898325

KEYWORDS: Bidirectional reflectance transmission function, Calibration, Short wave infrared radiation, Reflectivity, Sensors, Diffusers, Receivers, Indium gallium arsenide, Photodiodes, Ultraviolet radiation

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Proceedings Article | 14 September 2011 Paper

Characteristics of a new type of Mie scattering volume diffuser and its use as a spectral albedo calibration standard for the solar reflective wavelength region

Donald Heath, Georgi Georgiev

Proceedings Volume 8153, 81530V (2011) https://doi.org/10.1117/12.892109

KEYWORDS: Silica, Diffusers, Reflectivity, Transmittance, Calibration, Scattering, Aerospace engineering, Mie scattering, Vacuum ultraviolet, Spectral calibration

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Proceedings Article | 4 November 2010 Paper

Initial studies of the bidirectional reflectance distribution function of carbon nanotube structures for stray light control applications

James Butler, Georgi Georgiev, June Tveekrem, Manuel Quijada, Stephanie Getty, John Hagopian

Proceedings Volume 7862, 78620D (2010) https://doi.org/10.1117/12.869569

KEYWORDS: Bidirectional reflectance transmission function, Reflectivity, Silicon, Carbon nanotubes, Stray light, Light scattering, Titanium, Optical testing, Stray light control, Diffusers

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Proceedings Article | 21 August 2009 Paper

Progress in BRDF calibration measurements in the SWIR

Georgi Georgiev, James Butler

Proceedings Volume 7452, 745205 (2009) https://doi.org/10.1117/12.827356

KEYWORDS: Bidirectional reflectance transmission function, Calibration, Receivers, Reflectivity, Short wave infrared radiation, Diffusers, Sensors, Light sources, Data modeling, Photodiodes

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Proceedings Article | 20 August 2008 Paper

BRDF study of gray-scale Spectralon

Georgi Georgiev, James Butler

Proceedings Volume 7081, 708107 (2008) https://doi.org/10.1117/12.795931

KEYWORDS: Bidirectional reflectance transmission function, Reflectivity, Calibration, Sensors, Diffusers, Satellites, Remote sensing, Vegetation, Systems modeling, Light scattering

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Proceedings Article | 7 September 2006 Paper

Comparison between laboratory and airborne BRDF measurements for remote sensing

Georgi Georgiev, Charles Gatebe, James Butler, Michael King

Proceedings Volume 6296, 629603 (2006) https://doi.org/10.1117/12.680542

KEYWORDS: Bidirectional reflectance transmission function, Sensors, Reflectivity, Remote sensing, Vegetation, Backscatter, Solar radiation models, Calibration, Scattering, Light scattering

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Proceedings Article | 22 August 2005 Paper

The effect of speckle on BRDF measurements

Georgi Georgiev, James Butler

Proceedings Volume 5882, 588203 (2005) https://doi.org/10.1117/12.620128

KEYWORDS: Bidirectional reflectance transmission function, Speckle, Sensors, Diffusers, Laser sources, Telescopes, Reflectivity, Calibration, Speckle pattern, Light sources

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Proceedings Article | 4 November 2004 Paper

The effect of incident light polarization on spectralon BRDF measurements

Georgi Georgiev, James Butler

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565686

KEYWORDS: Bidirectional reflectance transmission function, Polarization, Sensors, Calibration, Diffusers, Reflectivity, Scattering, Light scattering, Satellites, Ultraviolet radiation

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Proceedings Article | 26 October 2004 Paper

Long-term comparison of spectralon BRDF measurements in the ultraviolet

Georgi Georgiev, James Butler

Proceedings Volume 5542, (2004) https://doi.org/10.1117/12.559920

KEYWORDS: Bidirectional reflectance transmission function, Calibration, Ultraviolet radiation, Sensors, Satellites, Target acquisition, Ozone, Diffusers, Remote sensing, Aerospace engineering

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Proceedings Article | 16 October 2003 Paper

The effect of weave orientation on the BRDF of tarp samples

Georgi Georgiev, James Butler

Proceedings Volume 5189, (2003) https://doi.org/10.1117/12.505865

KEYWORDS: Bidirectional reflectance transmission function, Sensors, Reflectivity, Calibration, Error analysis, Receivers, Light sources, Ultraviolet radiation, Optical spheres, Near infrared

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Proceedings Article | 22 October 2002 Paper

Bidirectional reflectance distribution function and hemispherical reflectance of JSC MARS-1

Georgi Georgiev, James Butler

Proceedings Volume 4780, (2002) https://doi.org/10.1117/12.461934

KEYWORDS: Bidirectional reflectance transmission function, Reflectivity, Calibration, Ultraviolet radiation, Near infrared, Receivers, Error analysis, Scatter measurement, Optical spheres, Sensors

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Showing 5 of 23 publications

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