Amir Ibrahim

Gao, M., B. A. Franz, P.-W. Zhai, et al. K. Knobelspiesse, A. Sayer, X. Xu, V. Martins, B. Cairns, P. Castellanos, G. Fu, N. Hannadige, O. Hasekamp, Y. Hu, A. Ibrahim, F. Patt, A. Puthukkudy, and P. J. Werdell. 2023. Simultaneous retrieval of aerosol and ocean properties from PACE HARP2 with uncertainty assessment using cascading neural network radiative transfer models [10.5194/egusphere-2023-1843]

Agagliate, J., R. Foster, A. Ibrahim, and A. Gilerson. 2023. A neural network approach to the estimation of in-water attenuation to absorption ratios from PACE mission measurements Frontiers in Remote Sensing 4 [10.3389/frsen.2023.1060908]

Hannadige, N. K., P.-W. Zhai, P. J. Werdell, et al. M. Gao, B. A. Franz, K. Knobelspiesse, and A. Ibrahim. 2023. Optimizing retrieval spaces of bio-optical models for remote sensing of ocean color Applied Optics 62 (13): 3299 [10.1364/ao.484082]

Sayer, A. M., L. Lelli, B. Cairns, et al. B. van Diedenhoven, A. Ibrahim, K. D. Knobelspiesse, S. Korkin, and P. J. Werdell. 2023. The CHROMA cloud-top pressure retrieval algorithm for the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite mission Atmospheric Measurement Techniques 16 (4): 969-996 [10.5194/amt-16-969-2023]

Gao, M., K. Knobelspiesse, B. Franz, et al. P.-W. Zhai, A. Sayer, A. Ibrahim, B. Cairns, O. Hasekamp, Y. Hu, V. Martins, J. Werdell, and X. Xu. 2022. Effective uncertainty quantification for multi-angle polarimetric aerosol remote sensing over ocean Atmos. Meas. Tech. 15 (16): 4859–4879 [10.5194/amt-15-4859-2022]

Zhang, M., A. Ibrahim, B. A. Franz, Z. Ahmad, and A. M. Sayer. 2022. Estimating pixel-level uncertainty in ocean color retrievals from MODIS Optics Express 30 (17): 31415 [10.1364/oe.460735]

Ibrahim, A., B. Franz, A. Sayer, et al. K. Knobelspiesse, M. Zhang, S. Bailey, L. McKinna, M. Gao, and P. J. Werdell. 2022. Optimal Estimation Framework for Ocean Color Atmospheric Correction and Pixel-level Uncertainty Quantification Applied Optics Vol. 61 No. 20 [10.1364/ao.461861]

Gilerson, A., E. Herrera-Estrella, R. Foster, et al. J. Agagliate, C. Hu, A. Ibrahim, and B. Franz. 2022. Determining the Primary Sources of Uncertainty in Retrieval of Marine Remote Sensing Reflectance From Satellite Ocean Color Sensors Frontiers in Remote Sensing 3 [10.3389/frsen.2022.857530]

Zhai, P.-W., M. Gao, B. A. Franz, et al. P. J. Werdell, A. Ibrahim, Y. Hu, and J. Chowdhary. 2022. A Radiative Transfer Simulator for PACE: Theory and Applications Frontiers in Remote Sensing 3 [10.3389/frsen.2022.840188]

Gao, M., K. Knobelspiesse, B. A. Franz, et al. P.-W. Zhai, V. Martins, S. P. Burton, B. Cairns, R. Ferrare, M. A. Fenn, O. Hasekamp, Y. Hu, A. Ibrahim, A. M. Sayer, P. J. Werdell, and X. Xu. 2021. Adaptive Data Screening for Multi-Angle Polarimetric Aerosol and Ocean Color Remote Sensing Accelerated by Deep Learning Frontiers in Remote Sensing 2 [10.3389/frsen.2021.757832]

Korkin, S., A. Sayer, A. Ibrahim, and A. Lyapustin. 2021. A practical guide to writing a radiative transfer code Computer Physics Communications 271 108198 [10.1016/j.cpc.2021.108198]

Bisson, K. M., E. Boss, P. J. Werdell, et al. A. Ibrahim, R. Frouin, and M. J. Behrenfeld. 2021. Seasonal bias in global ocean color observations Applied Optics 60 (23): 6978 [10.1364/ao.426137]

Gao, M., B. A. Franz, K. Knobelspiesse, et al. P.-W. Zhai, V. Martins, S. Burton, B. Cairns, R. Ferrare, J. Gales, O. Hasekamp, Y. Hu, A. Ibrahim, B. McBride, A. Puthukkudy, P. J. Werdell, and X. Xu. 2021. Efficient multi-angle polarimetric inversion of aerosols and oceancolor powered by a deep neural network forward model Atmospheric Measurement Techniques 14 (6): 4083–4110 [https://doi.org/10.5194/amt-14-4083-2021]

Knobelspiesse, K., A. Ibrahim, B. Franz, et al. S. Bailey, R. Levy, Z. Ahmad, J. Gales, M. Gao, M. Garay, S. Anderson, and O. Kalashnikova. 2021. Analysis of simultaneous aerosol and ocean glint retrieval using multi-angle observations Atmospheric Measurement Techniques 14 3233-3252 [10.5194/amt-14-3233-2021]

Hannadige, N. K., P.-W. Zhai, M. Gao, et al. B. A. Franz, Y. Hu, K. Knobelspiesse, J. Werdell, A. Ibrahim, B. Cairns, and O. P. Hasekamp. 2021. Atmospheric correction over the ocean for hyperspectral radiometers using multi-angle polarimetric retrievals Optics Express 29 (3): 4504 [10.1364/oe.408467]

Bisson, K. M., E. Boss, P. J. Werdell, A. Ibrahim, and M. J. Behrenfeld. 2020. Particulate backscattering in the global ocean: A comparison of independent assessments Geophysical Research Letters [10.1029/2020gl090909]

Gao, M., P.-W. Zhai, B. A. Franz, et al. K. Knobelspiesse, A. Ibrahim, B. Cairns, S. E. Craig, G. Fu, O. Hasekamp, Y. Hu, and P. J. Werdell. 2020. Inversion of multiangular polarimetric measurements from the ACEPOL campaign: an application of improving aerosol property and hyperspectral ocean color retrievals Atmospheric Measurement Techniques 13 3939–3956 [10.5194/amt-13-3939-2020]

Gilerson, A., C. Carrizo, A. Ibrahim, et al. R. Foster, T. Harmel, A. El-Habashi, Z. Lee, X. Yu, S. Ladner, and M. Ondrusek. 2020. Hyperspectral polarimetric imaging of the water surface and retrieval of water optical parameters from multi-angular polarimetric data Applied Optics 59 (10): C8 [10.1364/ao.59.0000c8]

Frouin, R. J., B. A. Franz, A. Ibrahim, et al. K. Knobelspiesse, Z. Ahmad, B. Cairns, J. Chowdhary, H. M. Dierssen, J. Tan, O. Dubovik, X. Huang, A. B. Davis, O. Kalashnikova, D. R. Thompson, L. A. Remer, E. Boss, O. Coddington, P.-Y. Deschamps, B.-C. Gao, L. Gross, O. Hasekamp, A. Omar, B. Pelletier, D. Ramon, F. Steinmetz, and P.-W. Zhai. 2019. Atmospheric Correction of Satellite Ocean-Color Imagery During the PACE Era Frontiers in Earth Science 7 [10.3389/feart.2019.00145]

Remer, L. A., K. Knobelspiesse, P.-W. Zhai, et al. F. Xu, O. V. Kalashnikova, J. Chowdhary, O. Hasekamp, O. Dubovik, L. Wu, Z. Ahmad, E. Boss, B. Cairns, O. Coddington, A. B. Davis, H. M. Dierssen, D. J. Diner, B. Franz, R. Frouin, B.-C. Gao, A. Ibrahim, R. C. Levy, J. V. Martins, A. H. Omar, and O. Torres. 2019. Retrieving Aerosol Characteristics From the PACE Mission, Part 2: Multi-Angle and Polarimetry Frontiers in Environmental Science 7 [10.3389/fenvs.2019.00094]

Remer, L. A., A. B. Davis, S. Mattoo, et al. R. C. Levy, O. V. Kalashnikova, O. Coddington, J. Chowdhary, K. Knobelspiesse, X. Xu, Z. Ahmad, E. Boss, B. Cairns, H. M. Dierssen, D. J. Diner, B. Franz, R. Frouin, B.-C. Gao, A. Ibrahim, J. V. Martins, A. H. Omar, O. Torres, F. Xu, and P.-W. Zhai. 2019. Retrieving Aerosol Characteristics From the PACE Mission, Part 1: Ocean Color Instrument Frontiers in Earth Science 7 [10.3389/feart.2019.00152]

Gao, M., P.-W. Zhai, B. A. Franz, et al. Y. Hu, K. Knobelspiesse, P. J. Werdell, A. Ibrahim, B. Cairns, and A. Chase. 2019. Inversion of multi-angular polarimetric measurements over open and coastal ocean waters: a joint retrieval algorithm for aerosol and water leaving radiance properties Atmospheric Measurement Techniques 12 (7): 3921–3941 [10.5194/amt-12-3921-2019]

Chowdhary, J., P. Zhai, E. Boss, et al. H. M. Dierssen, R. J. Frouin, A. Ibrahim, Z. Lee, L. A. Remer, M. Twardowski, F. Xu, X. Zhang, M. Ottaviani, W. R. Espinosa, and D. Ramon. 2019. Modeling Atmosphere-Ocean Radiative Transfer: A PACE Mission Perspective Frontiers in Earth Science 7 100 pp. [10.3389/feart.2019.00100]

Ibrahim, A., B. A. Franz, Z. Ahmad, and S. W. Bailey. 2019. Multiband Atmospheric Correction Algorithm for Ocean Color Retrievals Frontiers in Earth Science 7 [10.3389/feart.2019.00116]

Jamet, C., A. Ibrahim, Z. Ahmad, et al. F. Angelini, M. Babin, M. J. Behrenfeld, E. Boss, B. Cairns, J. Churnside, J. Chowdhary, A. B. Davis, D. Dionisi, L. Duforêt-Gaurier, B. Franz, R. Frouin, M. Gao, D. Gray, O. Hasekamp, X. He, C. Hostetler, O. V. Kalashnikova, K. Knobelspiesse, L. Lacour, H. Loisel, V. Martins, E. Rehm, L. Remer, I. Sanhaj, K. Stamnes, S. Stamnes, S. Victori, J. Werdell, and P.-W. Zhai. 2019. Going Beyond Standard Ocean Color Observations: Lidar and Polarimetry Frontiers in Marine Science 6 [10.3389/fmars.2019.00251]

Gao, M., P.-W. Zhai, B. Franz, et al. Y. Hu, K. Knobelspiesse, P. J. Werdell, A. Ibrahim, F. Xu, and B. Cairns. 2018. Retrieval of aerosol properties and water-leaving reflectance from multi-angular polarimetric measurements over coastal waters Optics Express 26 (7): 8968 [10.1364/oe.26.008968]

Ottaviani, M., R. Foster, A. Gilerson, et al. A. Ibrahim, C. Carrizo, A. El-Habashi, B. Cairns, J. Chowdhary, C. Hostetler, J. Hair, S. Burton, Y. Hu, M. Twardowski, N. Stockley, D. Gray, W. Slade, and I. Cetinic. 2018. Airborne and shipborne polarimetric measurements over open ocean and coastal waters: Intercomparisons and implications for spaceborne observations Remote Sensing of Environment 206 375-390 [10.1016/j.rse.2017.12.015]

Ibrahim, A., B. Franz, Z. Ahmad, et al. R. Healy, K. Knobelspiesse, B.-C. Gao, C. Proctor, and P.-W. Zhai. 2018. Atmospheric correction for hyperspectral ocean color retrieval with application to the Hyperspectral Imager for the Coastal Ocean (HICO) Remote Sensing of Environment 204 60-75 [10.1016/j.rse.2017.10.041]

Zhai, P.-W., K. Knobelspiesse, A. Ibrahim, et al. B. A. Franz, Y. Hu, M. Gao, and R. Frouin. 2017. Water-leaving contribution to polarized radiation field over ocean Optics Express 25 (16): A689 [10.1364/oe.25.00a689]

Ibrahim, A., A. Gilerson, J. Chowdhary, and S. Ahmed. 2016. Retrieval of macro- and micro-physical properties of oceanic hydrosols from polarimetric observations Remote Sensing of Environment 186 548-566 [10.1016/j.rse.2016.09.004]

Gu, Y., C. Carrizo, A. A. Gilerson, et al. P. C. Brady, M. E. Cummings, M. S. Twardowski, J. M. Sullivan, A. I. Ibrahim, and G. W. Kattawar. 2016. Polarimetric imaging and retrieval of target polarization characteristics in underwater environment Applied Optics 55 (3): 626--637 [10.1364/AO.55.000626]

Brady, P. C., A. A. Gilerson, G. W. Kattawar, et al. J. M. Sullivan, M. S. Twardowski, H. M. Dierssen, M. Gao, K. Travis, R. I. Etheredge, A. Tonizzo, A. Ibrahim, C. Carrizo, Y. Gu, B. J. Russell, K. Mislinski, S. Zhao, and M. E. Cummings. 2015. Open-ocean fish reveal an omnidirectional solution to camouflage in polarized environments Science 350 (6263): 965-969 [10.1126/science.aad5284]

Ibrahim, A., A. Gilerson, T. Harmel, et al. A. Tonizzo, J. Chowdhary, and S. Ahmed. 2012. The relationship between upwelling underwater polarization and attenuation/absorption ratio Opt. Express 20 (23): 25,662-25,680 [10.1364/OE.20.025662]

Tonizzo, A., A. Gilerson, T. Harmel, et al. A. Ibrahim, J. Chowdhary, B. Gross, F. Moshary, and S. Ahmed. 2011. Estimating particle composition and size distribution from polarized water-leaving radiance Applied Optics 50 (25): 5047-5058 [10.1364/AO.50.005047]

Foster, R., A. Ibrahim, A. Gilerson, et al. C. Carrizo, A. El-Habashi, and S. Ahmed. 2015. Polarized above sea surface hyperspectral observations and their relationship with measured water properties Hyperspectral Imaging and Sounding of the Environment HT3B--4

Gilerson, A., C. Carrizo, A. Tonizzo, et al. A. Ibrahim, A. El-Habashi, R. Foster, and S. Ahmed. 2013. Polarimetric imaging of underwater targets SPIE Defense, Security, and Sensing 872403--872403

Ahmed, S., A. Tonizzo, A. Ibrahim, et al. A. Gilerson, B. Gross, and F. Moshary. 2012. Algal fluorescence: impact and potential for retrieval from measurements of the underwater degree of polarization SPIE Remote Sensing 85320I--85320I

Gilerson, A., A. Ibrahim, T. Harmel, A. Tonizzo, and S. Ahmed. 2012. Polarization techniques for the retrieval of water parameters from above and below water polarimetric observations Proc. of SPIE Vol 8372 83720T--1

Harmel, T., A. Tonizzo, A. Ibrahim, et al. A. Gilerson, J. Chowdhary, and S. Ahmed. 2011. Measuring underwater polarization field from above-water hyperspectral instrumentation for water composition retrieval SPIE Remote Sensing 817509--817509

Ibrahim, A., T. Harmel, A. Tonizzo, et al. I. Ioannou, A. Gilerson, and S. Ahmed. 2011. Exploring the relation between polarized light fields and physical-optical characteristics of the ocean for Remote Sensing applications SPIE Optical Engineering+ Applications 81600H--81600H

Hlaing, S., T. Harmel, A. Ibrahim, et al. I. Ioannou, A. Tonizzo, A. Gilerson, and S. Ahmed. 2010. Validation of ocean color satellite sensors using coastal observational platform in Long Island Sound Remote Sensing 782504--782504