Dr. Robert Foster Profile

Dr. Robert Foster

at U.S. Naval Research Laboratory

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 7 June 2024 Presentation + Paper

Optimal estimation of aerosol properties using all-sky polarimetry

Robert Foster, Marcos Montes, Ahmed El-Habashi, Alex Gilerson

Proceedings Volume 13050, 1305009 (2024) https://doi.org/10.1117/12.3013081

KEYWORDS: Aerosols, Reflectivity, Atmospheric particles, Atmospheric modeling, Polarimetry, Equipment, Ocean optics, Near infrared, Water, Data modeling

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Proceedings Article | 6 June 2024 Presentation + Paper

Estimation of uncertainties in above-water radiometric measurements from hyperspectral and polarimetric imaging

Mateusz Malinowski, Eder Herrera-Estrella, Robert Foster, Jacopo Agagliate, Alexander Gilerson

Proceedings Volume 13061, 1306103 (2024) https://doi.org/10.1117/12.3014923

KEYWORDS: Imaging systems, Cameras, Wind speed, Polarimetry, Measurement uncertainty, Hyperspectral imaging, Reflection, Equipment, Ocean optics, Tunable filters

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SPIE Journal Paper | 25 June 2021 Open Access

Spectral decomposition of remote sensing reflectance variance due to the spatial variability from ocean color and high-resolution satellite sensors

Eder Herrera Estrella, Alexander Gilerson, Robert Foster, Philipp Groetsch

JARS, Vol. 15, Issue 02, 024522, (June 2021) https://doi.org/10.1117/12.10.1117/1.JRS.15.024522

KEYWORDS: Reflectivity, Remote sensing, Aerosols, Water, Sensors, Spatial resolution, Earth observing sensors, Satellites, Atmospheric modeling, Atmospheric corrections

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Proceedings Article | 20 September 2020 Presentation + Paper

Uncertainties in remote sensing reflectance at various spatial scales

Alex Gilerson, Eder Herrera Estrella, Philipp Groetsch, Robert Foster, Mateusz Malinowski

Proceedings Volume 11529, 1152905 (2020) https://doi.org/10.1117/12.2574328

KEYWORDS: Reflectivity, Remote sensing, Sensors, Spatial resolution, Satellites, Atmospheric propagation, Optical properties, Sun, Light wave propagation, Radiative transfer

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Proceedings Article | 14 October 2019 Presentation + Paper

Multi- and hyperspectral polarimetric imaging of the ocean surface

Alex Gilerson, Carlos Carrizo, Mateusz Malinowski, Philipp Groetsch, Robert Foster, Eder Herrera Estrella

Proceedings Volume 11150, 1115007 (2019) https://doi.org/10.1117/12.2534055

KEYWORDS: Polarization, Imaging systems, Cameras, Polarimetry, Hyperspectral imaging, Optical filters, Calibration, Water, Video, Reflectivity

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Proceedings Article | 10 May 2019 Presentation + Paper

Total and polarized radiance from the ocean surface from hyperspectral polarimetric imaging

Alex Gilerson, Carlos Carrizo, Robert Foster, Tristan Harmel, Andrii Golovin, Ahmed El-Habashi, Eder Herrera, Trevor Wright

Proceedings Volume 11014, 110140F (2019) https://doi.org/10.1117/12.2521143

KEYWORDS: Imaging systems, Polarization, Polarimetry, Water, Aerosols, Scattering, Polarizers, Atmospheric particles, Hyperspectral imaging, Ocean optics

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Proceedings Article | 25 May 2018 Presentation + Paper

Comparison of aerosol models from the Ocean Color satellite sensors and AERONET-OC and their impact on reflectance spectra in coastal waters

Alexander Gilerson, Eder Herrera, Yaron Klein, Robert Foster, Barry Gross, Robert Arnone, Sam Ahmed

Proceedings Volume 10631, 1063106 (2018) https://doi.org/10.1117/12.2309581

KEYWORDS: Aerosols, Satellites, Sensors, Reflectivity, MODIS, Atmospheric modeling, Atmospheric corrections, Water, Remote sensing, Data modeling

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Proceedings Article | 25 May 2018 Presentation + Paper

Ocean surface characterization using snapshot hyperspectral polarimetric imager

Carlos Carrizo, Andrii Golovin, Ahmed El-Habashi, Robert Foster, Deric Gray, Jeff Bowles, Alexander Gilerson

Proceedings Volume 10631, 1063107 (2018) https://doi.org/10.1117/12.2309585

KEYWORDS: Imaging systems, Hyperspectral imaging, Polarization, Water, Cameras, Hyperspectral simulation, Polarimetry, Ocean optics, Scattering, Polarizers

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Proceedings Article | 3 October 2017 Paper

Imaging of polarized target in underwater environment

Carlos Carrizo, Robert Foster, Ahmed El-Habashi, Deric Gray, Alex Gilerson

Proceedings Volume 10422, 104220F (2017) https://doi.org/10.1117/12.2279149

KEYWORDS: Polarization, Polarimetry, Water, Submerged target modeling, Underwater imaging, Video, Signal attenuation, Atmospheric modeling, Environmental sensing, Cameras

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Proceedings Article | 3 October 2017 Paper

Characterization of aerosol parameters over ocean from the Ocean Color satellite sensors and AERONET-OC data

Alex Gilerson, Eder Herrera, Yaron Klein, Robert Foster, Barry Gross, Robert Arnone, Sam Ahmed

Proceedings Volume 10422, 104220H (2017) https://doi.org/10.1117/12.2279150

KEYWORDS: Aerosols, Atmospheric modeling, Satellites, Atmospheric corrections, Reflectivity, Sensors, Scattering, Atmospheric particles, Ocean optics, Data modeling

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Proceedings Article | 5 September 2017 Paper

Impact of fluorescence on the underwater polarized light field: comparison of theory and field measurements

Ahmed El-Habashi, Robert Foster, Carlos Carrizo, Thomas Legbandt, Sam Ahmed

Proceedings Volume 10402, 104022Q (2017) https://doi.org/10.1117/12.2279618

KEYWORDS: Luminescence, Polarization, Radiative transfer, Optical properties, Optical testing, Water, Polarimetry, Remote sensing, Ocean optics, Coastal modeling, Algorithm development

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Proceedings Article | 22 May 2017 Paper

Mueller matrices of hydrosols and their impact on the polarized light fields from the ocean water

Robert Foster, Anna McGilloway, Alex Gilerson

Proceedings Volume 10186, 101860N (2017) https://doi.org/10.1117/12.2266557

KEYWORDS: Radiative transfer, Polarimetry, Mueller matrices, Polarization, Remote sensing, Particles, Light scattering, Mie scattering

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Proceedings Article | 4 May 2016 Paper

Retrieval of the polarized submarine light field from above surface measurements using polarimetric imaging

Robert Foster, Anna McGilloway, Matteo Ottaviani, Carlos Carrizo, Alex Gilerson, Ahmed El-Habashi, Sam Ahmed

Proceedings Volume 9853, 98530O (2016) https://doi.org/10.1117/12.2225111

KEYWORDS: Polarization, Remote sensing, Polarimetry, Cameras, Water, Radiative transfer, Radiometry, Polarizers, Calibration, Sensors

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Proceedings Article | 14 October 2015 Paper

Multi-band algorithms for the estimation of chlorophyll concentration in the Chesapeake Bay

Alexander Gilerson, Michael Ondrusek, Maria Tzortziou, Robert Foster, Ahmed El-Habashi, Surya Prakash Tiwari, Sam Ahmed

Proceedings Volume 9638, 96380A (2015) https://doi.org/10.1117/12.2195725

KEYWORDS: Satellites, Algorithm development, MODIS, Absorption, Sensors, Remote sensing, Satellite imaging, Reflectivity, Earth observing sensors, Particles

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Proceedings Article | 1 September 2015 Paper

Characterization of sun and sky glint from wind ruffled sea surfaces for improved estimation of polarized remote sensing reflectance

Robert Foster, Amir Ibrahim, Alex Gilerson, Ahmed El-Habashi, Carlos Carrizo, Sam Ahmed

Proceedings Volume 9613, 96130W (2015) https://doi.org/10.1117/12.2190652

KEYWORDS: Monte Carlo methods, Sensors, Sun, Electroluminescent displays, Radiative transfer, Matrices, Radiometry, Polarization, Aerosols, Scattering

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Proceedings Article | 14 October 2014 Paper

Retrieval of water optical properties using polarization of light underwater: case I and II waters

Alexander Gilerson, Amir Ibrahim, Robert Foster, Carlos Carrizo, Ahmed El-Habashi, Samir Ahmed

Proceedings Volume 9240, 92400R (2014) https://doi.org/10.1117/12.2067963

KEYWORDS: Scattering, Water, Absorption, Polarization, Sun, Signal attenuation, Particles, Ocean optics, Light scattering, Neodymium

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Proceedings Article | 14 October 2014 Paper

Remote estimation of in water constituents in coastal waters using neural networks

Ioannis Ioannou, Alexander Gilerson, Michael Ondrusek, Soe Hlaing, Robert Foster, Ahmed El-Habashi, Kaveh Bastani, Samir Ahmed

Proceedings Volume 9240, 92400T (2014) https://doi.org/10.1117/12.2067772

KEYWORDS: Absorption, Water, Neural networks, Satellites, Algorithm development, Data modeling, Computer simulations, Backscatter, MODIS, Atmospheric corrections

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Remote estimations of oceanic constituents from optical reflectance spectra in coastal waters are challenging because of the complexity of the water composition as well as difficulties in estimation of water leaving radiance in several bands possibly due to inadequacy of current atmospheric correction schemes. This work focuses on development of a multiband inversion algorithm that combines remote sensing reflectance measurements at several wavelengths in the blue, green and red for retrievals of the absorption coefficients of phytoplankton, color dissolved organic matter and nonalgal particulates at 443nm as well as the particulate backscatter coefficient at 443nm. The algorithm was developed, using neural networks (NN), and was designed to use as input measurements on ocean color bands matching those of the Visible Infrared Imaging Radiometer Suite (VIIRS). The NN is trained on a simulated data set generated through a biooptical model for a broad range of typical coastal water parameters. The NN was evaluated using several statistical indicators, initially on the simulated data-set, as well as on field data from the NASA bio-Optical Marine Algorithm Data set, NOMAD, and data from our own field campaigns in the Chesapeake Bay which represent well the range of water optical properties as well as chlorophyll concentrations in coastal regions. The algorithm was also finally applied on a satellite - in situ databases that were assembled for the Chesapeake Bay region using MODIS and VIIRS satellite data. These databases were created using in-situ chlorophyll concentrations routinely measured in different locations throughout Chesapeake Bay and satellite reflectance overpass data that coexist in time with these in-situ measurements. NN application on this data-sets suggests that the blue (412 and 443nm) satellite bands are erroneous. The NN which was assessed for retrievals from VIIRS using only the 486, 551 and 671 bands showed that retrievals that omitted the 671 nm band was the most effective, possibly indicating an inaccuracy in the VIIRS 671 band that needs to be further investigated.

Proceedings Article | 23 May 2014 Paper

Underwater imaging of polarized targets

Alexander Gilerson, Yalong Gu, Carlos Carrizo, Amir Ibrahim, Ahmed El-Habashi, Robert Foster, Parrish Brady, Molly Cummings, Samir Ahmed

Proceedings Volume 9111, 91110N (2014) https://doi.org/10.1117/12.2053749

KEYWORDS: Point spread functions, Cameras, Light scattering, Polarization, Polarimetry, Mirrors, Imaging systems, Submerged target modeling, Monte Carlo methods, Scattering

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Proceedings Article | 23 May 2014 Paper

Algorithms for the remote estimation of chlorophyll-a in the Chesapeake Bay

I. Ioannou, A. Gilerson, M. Ondrusek, Robert Foster, Ahmed El-Habashi, K. Bastani, S. Ahmed

Proceedings Volume 9111, 911118 (2014) https://doi.org/10.1117/12.2053753

KEYWORDS: Near infrared, Algorithm development, Neural networks, Absorption, Evolutionary algorithms, Satellites, Sensors, Reflectivity, Data modeling, MODIS

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Proceedings Article | 5 August 2013 Paper

Neural network approach to separate the non-algal absorption coefficient into dissolved and particulate

Ioannis Ioannou, Robert Foster, Alex Gilerson, Sam Ahmed

Proceedings Volume 8795, 87951N (2013) https://doi.org/10.1117/12.2028379

KEYWORDS: Absorption, Neural networks, Remote sensing, Reflectivity, Satellites, MODIS, Algorithm development, Sensors, Visible radiation, Water

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Proceedings Article | 3 June 2013 Paper

Neural network approach for the derivation of chlorophyll concentration from ocean color

Ioannis Ioannou, Robert Foster, Alex Gilerson, Barry Gross, Fred Moshary, Sam Ahmed

Proceedings Volume 8724, 87240P (2013) https://doi.org/10.1117/12.2018143

KEYWORDS: MODIS, Reflectivity, Water, Neural networks, Algorithm development, Absorption, Satellites, Remote sensing, Ocean optics, Data modeling

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Proceedings Article | 3 June 2013 Paper

Polarimetric imaging of underwater targets

Alex Gilerson, Carlos Carrizo, Alberto Tonizzo, Amir Ibrahim, Ahmed El-Habashi, Robert Foster, Samir Ahmed

Proceedings Volume 8724, 872403 (2013) https://doi.org/10.1117/12.2018132

KEYWORDS: Cameras, Polarization, Scattering, Polarizers, Polarimetry, Mirrors, Light scattering, Water, Signal attenuation, Absorption

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Showing 5 of 22 publications

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