Directory

Directory

Amir Ibrahim, Post-Doctoral Researcher

Amir Ibrahim

CONTACT INFO

NASA Goddard Space Flight Center (USRA / Code 616)
8800 Greenbelt Rd, Greenbelt, MD 20771
Building 28, Rm. W103

Phone: (301) 286-5429
Fax: (301) 286-0268
Email: amir.ibrahim@nasa.gov
Personal Url: https://scholar.google.com/citations?user=Rm1AvuIAAAAJ&hl=en

RESEARCH INTERESTS

Dr. Ibrahim works as a Post doctoral researcher (USRA) at the Ocean Ecology Lab (616) in support of the Pre-Aerosol, Clouds, and ocean Ecosystem (PACE) mission's Science Team activities to develop and evaluate atmospheric correction methods for derivation of ocean color from a hyperspectral radiometer and combined multi-angle polarimeter.

RESEARCH INTERESTS
• Inversion of the vector radiative transfer equation in the coupled ocean-atmosphere system.
• Retrieval of useful optical and microphysical properties of aerosols/hydrosols using the polarization of light.
• Improvement of atmospheric correction procedures for ocean color remote sensing.
• Assessment of the impact of atmospheric aerosols on the observed spectral scalar and polarized radiance at both sea surface level and at top of the atmosphere.
• Hyperspectral data processing and analysis of underwater, shipborne, airborne, and satellite measurements.

BIOGRAPHY

Dr. Ibrahim obtained his PhD. degree in February 2015 from the Electrical Engineering Dept. at the City College of the City University of New York (CCNY). His dissertation focused on ocean color remote sensing using polarimetric observation of light. He developed an inversion algorithm based on Vector Radiative Transfer (VRT) models to retrieve macro- and micro-physical properties of oceanic hydrosols that helps in improving our understandings of the ocean geochemical properties in addition to improving the estimates of global chlorophyll and suspended minerals concentrations.

AWARDS/HONORS
• Honorary Mention awarded for Best Student Paper titled “Retrievals of the Attenuation and Scattering Coefficients of Marine Particles Using the Polarization of Light” from the oceanography society at the Ocean Optics 2014 conference, Portland, Maine.
• Certificate of Distinguished Achievement in Academic Excellence, NOAA-CREST Institute, 2013, The City College of New York.
• Honorary Mention awarded for Best Student Paper titled “The Relationship between Upwelling Polarized Radiance and In-Water Attenuation to Absorption Ratio” from the oceanography society at the Ocean Optics 2012 conference, Glasgow, Scotland.
• Graduate Teaching Fellowship, 2011-2013.
• Eta Kappa Nu, Electrical and Computer Engineering Honor Society, 2008
• Tau Beta Pi, National Engineering Honor Society, 2007

JOURNAL ARTICLES
• Alexander A. Gilerson, Jan Stepinski, Amir I. Ibrahim, Yu You, James M. Sullivan, Michael S. Twardowski, Heidi M. Dierssen, Brandon Russell, Molly E. Cummings, Parrish Brady, Samir A. Ahmed, and George W. Kattawar, “Benthic effects on the polarization of light in shallow waters,” Appl. Opt. 52, 8685-8705 (2013).
• Amir Ibrahim, Alexander Gilerson, Tristan Harmel, Alberto Tonizzo, Jacek Chowdhary, and Samir Ahmed, “The relationship between upwelling underwater polarization and attenuation/absorption ratio,” Opt. Express 20, 25662-25680 (2012).
• Alberto Tonizzo, Alex Gilerson, Tristan Harmel, Amir Ibrahim, Jacek Chowdhary, Barry Gross, Fred Moshary, and Sam Ahmed, “Estimating particle composition and size distribution from polarized water-leaving radiance,” Appl. Opt. 50, 5047-5058 (2011).

PRESENTATIONS
• “Retrievals of the attenuation and scattering coefficients of marine particles using the polarization of light,” Ocean Optics XXII, Portland, Maine, October 2014.
• “Retrieval of ocean water parameters and characteristics of the underwater targets from polarimetric observations and imaging,” Polarisation techniques & technology Workshop, Lorentz Center, Leiden, Netherlands, March 2014.
• “The retrieval of scattering coefficient of marine particles from polarimetric observations,” SPIE Optical Engineering+ Applications, August 2013.
• “Retrieval of optical and microphysical properties of ocean constituents using polarimetric remote sensing,” Cooperative Institute for Meteorological Satellite Studies, Madison, WI, June 2013.
• “The retrieval of attenuation and scattering coefficients of marine particles from polarimetric observations,” International Ocean Colour Science Meeting, Darmstadt, Germany, May 2013
• “The Relationship between Upwelling Polarized Radiance and In-Water Attenuation to Absorption Ratio,” Ocean Optics XIIIII, Glasgow, Scotland, October 2012 (Poster Presentation).

PROCEEDINGS ARTICLE
• Alexander Gilerson, Amir Ibrahim, Robert Foster, Carlos Carrizo, Ahmed El-Habashi, et al. “ Retrieval of water optical properties using polarization of light underwater: case I and II waters “, Proc. SPIE 9240, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2014, 92400R (October 14, 2014).
• Alexander Gilerson, Yalong Gu, Carlos Carrizo, Amir Ibrahim, Ahmed El-Habashi, et al. “Underwater imaging of polarized targets “, Proc. SPIE 9111, Ocean Sensing and Monitoring VI, 91110N (May 23, 2014).
• Yalong Gu, Alexander Gilerson, Carlos Carrizo, Amir Ibrahim and Samir Ahmed, “Polarization analysis of target imaging in an underwater environment”, Proc. SPIE 9099, Polarization: Measurement, Analysis, and Remote Sensing XI, 90990X (May 21, 2014).
• Alexander Gilerson, Amir Ibrahim, Jan Stepinski and Samir Ahmed, “ Polarization of light in shallow waters”, Proc. SPIE 8888, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2013, 88880G (October 16, 2013).
• Amir Ibrahim, Alex Gilerson, Jan Stepinski, Ahmed El-Habashi and Samir Ahmed, “The retrieval of scattering coefficient of marine particles from polarimetric observations”, Proc. SPIE 8873, Polarization Science and Remote Sensing VI, 88730U (September 27, 2013).
• Samir Ahmed, Alberto Tonizzo, Amir Ibrahim, Alexander Gilerson, Barry Gross, et al. “Algal fluorescence: impact and potential for retrieval from measurements of the underwater degree of polarization”, Proc. SPIE 8532, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2012, 85320I (October 19, 2012).
• Alex Gilerson, Amir Ibrahim, Tristan Harmel, Alberto Tonizzo and Samir Ahmed, “Polarization techniques for the retrieval of water parameters from above and below water polarimetric observations”, Proc. SPIE 8372, Ocean Sensing and Monitoring IV, 83720T (June 12, 2012).
• Tristan Harmel, Alberto Tonizzo, Amir Ibrahim, Alexander Gilerson, Jacek Chowdhary, et al. “Measuring
underwater polarization field from above-water hyperspectral instrumentation for water composition retrieval”, Proc. SPIE 8175, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2011, 817509 (October 07, 2011).
• Amir Ibrahim, Tristan Harmel, Alberto Tonizzo, Ioannis Ioannou, Alex Gilerson, et al.” Exploring the relation between polarized light fields and physical-optical characteristics of the ocean for remote sensing applications “, Proc. SPIE 8160, Polarization Science and Remote Sensing V, 81600H (September 9, 2011).
• Alberto Tonizzo, Amir Ibrahim, Tristan Harmel, Alex Gilerson and Samir Ahmed “Estimation of the attenuation coefficient of the water body using polarimetric observations”, Proc. SPIE 8030, Ocean Sensing and Monitoring III, 803003 (May 04, 2011).
• Soe Hlaing, Tristan Harmel, Amir Ibrahim, Ioannis Ioannou, Alberto Tonizzo, et al. “Validation of ocean color satellite sensors using coastal observational platform in Long Island Sound”, Proc. SPIE 7825, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2010, 782504 (October 06, 2010).
• Alberto Tonizzo, Amir Ibrahim, Jing Zhou, Alexander Gilerson, Barry Gross, et al. “The impact of algal
fluorescence on the underwater polarized light field”, Proc. SPIE 7678, Ocean Sensing and Monitoring II, 76780K (April 20, 2010).
• Alberto Tonizzo, Tristan Harmel, Amir Ibrahim, Soe Hlaing, Ioannis Ioannou, et al. “Sensitivity of the above water polarized reflectance to the water composition”, Proc. SPIE 7825, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2010, 78250F (October 18, 2010).
• Alberto Tonizzo, Amir Ibrahim, Jing Zhou, Alexander Gilerson, Michael Twardowski, et al. “Estimation of the polarized water leaving radiance from above water measurements”, Proc. SPIE 7678, Ocean Sensing and Monitoring II, 767803 (April 20, 2010).