Dr. Kirk David Knobelspiesse

Dr. Kirk David Knobelspiesse

  • RESEARCH AST, OCEANOGRAPHIC STUDIES
  • 301.614.6242
  • NASA/GSFC
  • Mail Code: 616.2
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Kirk Knobelspiesse received an undergraduate degree in Photography from the Rochester Institute in Technolody in 1998, then a Master's degree in Imaging Science from the same university in 2000. For the next four years, he worked as a contractor at NASA GSFC on the SeaWiFS and SIMBIOS projects, then returned to graduate school at Columbia University in 2004. His PhD, in Applied Mathematics, dealt with remote sensing retrievals of atmospheric aerosols from multi-angle polarimeters. During his studies, he spent his time at NASA GISS, and remained at that institution for a Postdoctoral fellowship following graduation. He took a position at NASA Ames in 2012, and returned to NASA GSFC in 2016.

    Dr. Knobelspiesse investigates instrument systems for the optical remote sensing of parameters relevant to the Earth’s climate. This includes expertise in radiative transfer computations, algorithm development and validation with observations in the field. Specific areas of interest have been the polarimetric remote sensing of aerosols and clouds, and the atmospheric correction required for ocean color observations.

    Current Projects

    Plankton, Aerosol, Cloud and ocean Ecosystem (PACE) Mission

    PACE Project Science Team Polarimeter Lead  

    https://pace.gsfc.nasa.gov

    Aerosol/Clouds/Ecosystems (ACE) Mission

    ACE Polarimeter Working Group (ACEPWG) Coordinator 

    https://earthscience.arc.nasa.gov/acepwg

    ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) field Mission

    Multi-angle polarimeter retrieval development for aerosols above clouds 

    https://espo.nasa.gov/missions/ORACLES

    MOCMAC Project: MODIS Ocean Color with MISR Atmospheric Correction

    Funded as part of the NASA 2017 announcement "The Science of TERRA, AQUA and SUOMI NPP"

    Positions/Employment

    5/2016 - Present

    Research Oceanographer

    Ocean Ecology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD
    2012 - 2016

    Physical Scientist

    Atmospheric Science Branch, Earth Science Division, NASA Ames Research Center, Moffett Field, CA
    2011 - 2012

    Postdoctoral Fellow

    NASA Goddard Institute for Space Studies, New York, NY

    Advisor: Dr. Michael Mishchenko

    2006 - 2010

    Graduate research assistant

    Columbia University / NASA Goddard Institute for Space Studies, New York, NY

    Advisor: Dr. Brian Cairns

    2000 - 2004

    Analyst

    NASA Goddard Space Flight Center / Science Systems and Applications, Inc., Greenbelt, MD

    Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) Project
    Sensor Intercomparison and Merger for Biological and Interdisciplinary Oceanic Studies (SIMBIOS) Project

    Education

    Ph.D., Applied Mathematics, Columbia University, New York, NY. Thesis title: “Atmospheric aerosol optical property retrieval with scanning polarimeters,” 2011

    M.S., Applied Mathematics, Columbia University, New York, NY, 2007

    M.S., Imaging Science, Rochester Institute of Technology, Rochester, NY, 2000

    B.S., Imaging and Photographic Technology, Rochester Institute of Technology, Rochester, NY, 1998

    Awards

    National Science Foundation, Integrative Graduate Education and Research Traineeship, Fellow 2004-2009

    National Aeronautics and Space Administration, Group Achievement awards for the ARCTAS field campaign (2009), INTEX-B field campaign (2008) and SIMBIOS Project (2003).

    National Aeronautics and Space Administration, New Investigator Program award, "Quantitative simulation of polarimetric instruments using radiative transfer simulations and Bayesian statistical methods for the remote sensing of aerosols and clouds" (2014-2016).

    Publications

    Refereed

    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]

    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]

    Harten, G. V., D. J. Diner, B. J. Daugherty, et al. B. E. Rheingans, M. A. Bull, F. C. Seidel, R. A. Chipman, B. Cairns, A. P. Wasilewski, and K. D. Knobelspiesse. 2018. "Calibration and validation of Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) polarization measurements." Applied Optics, 57 (16): 4499 [10.1364/ao.57.004499]

    Miller, D. J., Z. Zhang, S. Platnick, et al. A. S. Ackerman, F. Werner, C. Cornet, and K. Knobelspiesse. 2018. "Comparisons of bispectral and polarimetric retrievals of marine boundary layer cloud microphysics: case studies using a LES–satellite retrieval simulator." Atmospheric Measurement Techniques, 11 (6): 3689-3715 [10.5194/amt-11-3689-2018]

    Knobelspiesse, K., and S. Nag. 2018. "Remote sensing of aerosols with small satellites in formation flight." Atmospheric Measurement Techniques, 11 (7): 3935-3954 [10.5194/amt-11-3935-2018]

    Segal-Rozenhaimer, M., D. J. Miller, K. Knobelspiesse, et al. J. Redemann, B. Cairns, and M. D. Alexandrov. 2018. "Development of neural network retrievals of liquid cloud properties from multi-angle polarimetric observations." Journal of Quantitative Spectroscopy and Radiative Transfer, 220: 39-51 [10.1016/j.jqsrt.2018.08.030]

    Neukermans, G., T. Harmel, M. Galí, et al. N. Rudorff, J. Chowdhary, O. Dubovik, C. Hostetler, Y. Hu, C. Jamet, K. Knobelspiesse, Y. Lehahn, P. Litvinov, A. M. Sayer, B. Ward, E. Boss, I. Koren, L. A. Miller, J. W. Deming, and K. Arrigo. 2018. "Harnessing remote sensing to address critical science questions on ocean-atmosphere interactions." Elem Sci Anth, 6: [10.1525/elementa.331]

    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]

    Burton, S. P., E. Chemyakin, X. Liu, et al. K. Knobelspiesse, S. Stamnes, P. Sawamura, R. H. Moore, C. A. Hostetler, and R. A. Ferrare. 2016. "Information content and sensitivity of the 3<i>β</i>&thinsp;+ 2<i>α</i> lidar measurement system for aerosol microphysical retrievals." Atmospheric Measurement Techniques, 9 (11): 5555-5574 [10.5194/amt-9-5555-2016]

    Alexandrov, M. D., B. Cairns, A. P. Wasilewski, et al. A. S. Ackerman, M. J. McGill, J. E. Yorks, J. E. Hlavka, S. E. Platnick, G. T. Arnold, B. van Diedenhoven, J. Chowdhary, M. Ottaviani, and K. D. Knobelspiesse. 2015. "Liquid water cloud properties during the Polarimeter Definition Experiment (PODEX)." Remote Sens. Environ., 169: 20-36 [doi:10.1016/j.rse.2015.07.029]

    Knobelspiesse, K., B. Van Diedenhoven, A. Marshak, et al. S. Dunagan, B. N. Holben, and I. Slutsker. 2015. "Cloud thermodynamic phase detection with polarimetrically sensitive passive sky radiometers." Atmos. Meas. Tech, 8: 1537-1554 [10.5194/amt-8-1537-2015]

    Russell, P. B., M. Kacenelenbogen, J. M. Livingston, et al. O. P. Hasekamp, S. P. Burton, G. L. Schuster, M. S. Johnson, K. D. Knobelspiesse, J. Redemann, S. Ramachandran, and B. N. Holben. 2014. "A multiparameter aerosol classification method and its application to retrievals from spaceborne polarimetry." J. Geophys. Res. Atmos., 119 (16): 9838–9863 [10.1002/2013JD021411]

    Knobelspiesse, K., B. Cairns, H. T. Jethva, et al. M. Kacenelenbogen, M. Segal-Rosenheimer, and O. Torres. 2014. "Remote sensing of above cloud aerosols." Light Scattering Reviews, 9: 167-210, ISBN: 978-3-642-37984-0 (Print) 978-3-642-37985-7 (Online).

    Ottaviani, M., K. Knobelspiesse, B. Cairns, and M. Mishchenko. 2013. "Information content of aerosol retrievals in the sunglint region." Geophys. Res. Lett., 40 (3): 631-634 [10.1002/grl.50148]

    Zhai, P., Y. Hu, C. A. Hostetler, et al. B. Cairns, R. A. Ferrare, K. D. Knobelspiesse, D. B. Josset, C. R. Trepte, P. L. Lucker, and J. Chowdhary. 2013. "Uncertainty and interpretation of aerosol remote sensing due to vertical inhomogeneity." J Quant Spectrosc Radiat Transfer, 114: 91-100 [10.1016/j.jqsrt.2012.08.006]

    Ottaviani, M., B. Cairns, J. Chowdhary, et al. B. van Diedenhoven, K. Knobelspiesse, C. Hostetler, R. Ferrare, S. Burton, J. Hair, M. D. Obland, and R. Rogers. 2012. "Polarimetric retrievals of surface and cirrus clouds properties in the region affected by the Deepwater Horizon oil spill." Remote Sens Environ, 121: 389-403 [10.1016/j.rse.2012.02.016]

    Knobelspiesse, K. D., B. Cairns, M. I. Mishchenko, et al. J. Chowdhary, K. Tsigaridis, B. Van Diedenhoven, W. Martin, M. Ottaviani, and M. D. Alexandrov. 2012. "Analysis of fine-mode aerosol retrieval capabilities by different passive remote sensing instrument designs." Opt. Express, 20 (19): 21,457-21,484 [10.1364/OE.20.021457]

    Chowdhary, J., B. Cairns, F. Waquet, et al. K. Knobelspiesse, M. Ottaviani, J. Redemann, L. Travis, and M. Mishchenko. 2012. "Sensitivity of multiangle, multispectral polarimetric remote sensing over open oceans to water-leaving radiance: Analyses of RSP data acquired during the MILAGRO campaign." Remote Sens Environ, 118: 284-308 [10.1016/j.rse.2011.11.003]

    Knobelspiesse, K. D., B. Cairns, M. Ottaviani, et al. R. Ferrare, J. Hair, C. Hostetler, M. Obland, R. Rogers, J. Redemann, Y. Shinozuka, A. Clarke, S. Freitag, S. Howell, V. Kapustin, and C. McNaughton. 2011. "Combined retrievals of boreal forest fire aerosol properties with a polarimeter and lidar." Atmos. Chem. Phys., 11 (14): 7045-7067 [10.5194/acp-11-7045-2011]

    Knobelspiesse, K. D., B. Cairns, J. Redemann, R. W. Bergstrom, and A. Stohl. 2011. "Simultaneous retrieval of aerosol and cloud properties during the MILAGRO field campaign." Atmos. Chem. Phys., 11 (13): 6245-6263 [10.5194/acp-11-6245-2011]

    Waquet, F., B. Cairns, K. Knobelspiesse, et al. J. Chowdhary, L. D. Travis, B. Schmid, and M. I. Mishchenko. 2009. "Polarimetric remote sensing of aerosols over land." J. Geophys. Res., 114 (D1): D01206 [10.1029/2008JD010619]

    Knobelspiesse, K. D., B. Cairns, B. Schmid, M. O. Román, and C. B. Schaaf. 2008. "Surface BRDF estimation from an aircraft compared to MODIS and ground estimates at the Southern Great Plains site." J. Geophys. Res., 113 (D20): D20105 [10.1029/2008JD010062]

    Chu, D. A., L. A. Remer, Y. J. Kaufman, et al. B. Schmid, J. Redemann, K. Knobelspiesse, J. D. Chern, J. Livingston, P. B. Russell, X. Xiong, and W. Ridgway. 2005. "Evaluation of aerosol properties over ocean from Moderate Resolution Imaging Spectroradiometer (MODIS) during ACE-Asia." J. Geophys. Res., 110 (D7): D07308 [10.1029/2004JD005208]

    Wang, M., K. D. Knobelspiesse, and C. R. McClain. 2005. "Study of the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) aerosol optical property data over ocean in combination with the ocean color products." J. Geophys. Res., 110 (D10): D10S06 [10.1029/2004JD004950]

    Miller, M. A., K. Knobelspiesse, R. Frouin, et al. M. J. Bartholomew, R. M. Reynolds, C. Pietras, G. Fargion, P. Quinn, and F. Thieuleux. 2005. "Analysis of shipboard aerosol optical thickness measurements from multiple sunphotometers aboard the R/V Ronald H. Brown during the Aerosol Characterization Experiment - Asia." Applied Optics, 44 (18): 3805 [10.1364/AO.44.003805]

    Knobelspiesse, K. D., C. Pietras, G. S. Fargion, et al. M. Wang, R. Frouin, M. A. Miller, A. Subramaniam, and W. M. Balch. 2004. "Maritime aerosol optical thickness measured by handheld sun photometers." Remote Sensing of Environment, 93 (1-2): 87-106 [10.1016/j.rse.2004.06.018]

    Werdell, P. J., S. W. Bailey, G. Fargion, et al. C. Pietras, K. D. Knobelspiesse, G. Feldman, and C. McClain. 2003. "Unique data repository facilitates ocean color satellite validation." Eos, Transactions American Geophysical Union, 84 (38): 377 [10.1029/2003EO380001]

    Knobelspiesse, K. D., C. Pietras, and G. S. Fargion. 2003. "Sun-Pointing Error Correction for Sea Deployment of the MICROTOPS II Handheld Sun Photometer." J Atmos Ocean Tech, 20 (5): 767-772.

    Frouin, R., B. N. Holben, M. Miller, et al. C. Pietras, K. D. Knobelspiesse, G. S. Fargion, J. Porter, and K. Voss. 2003. "Sun and Sky Radiance Measurements and Data Analysis Protocols." NASA/TM-2003-211621/Rev4-Vol III, NASA Goddard Space Flight Center, Greenbelt, Maryland, 60-78.

    Pietras, C., M. Miller, K. D. Knobelspiesse, et al. R. Frouin, B. N. Holben, and K. Voss. 2003. "Calibration of Sun Photometers and Sky Radiance Sensors." NASA/TM-2003-211621/Rev4-Vol II, NASA Goddard Space Flight Center, Greenbelt, Maryland, 34-49.

    Knobelspiesse, K. D., C. Pietras, and G. S. Fargion. 2003. "Sun-Pointing-Error Correction for Sea Deployment of the MICROTOPS II Handheld Sun Photometer." J Atmos and Ocean Tech, 20 (5): 767-771 [10.1175/1520-0426(2003)20<767:SPECFS>2.0.CO;2]

    Pietras, C., G. S. Fargion, and K. Knobelspiesse. 2003. "Investigation of Ocean Color Atmospheric Correction Algorithms Using In Situ Measurements of Aerosol Optical Thickness: Application to MODIS." NASA/TM-2003, NASA Goddard Space Flight Center, Greenbelt, Maryland, 41-46.

    Frouin, R., B. N. Holben, M. Miller, et al. C. Pietras, K. D. Knobelspiesse, G. S. Fargion, J. Porter, and K. Voss. 2002. "Sun and Sky Radiance Measurements and Data Analysis Protocols." NASA Tech Memo 2002-210004, NASA Goddard Space Flight Center, Greenbelt, Maryland, 211-227.

    Pietras, C., M. Miller, K. D. Knobelspiesse, et al. R. Frouin, B. N. Holben, and K. Voss. 2002. "Calibration of Sun Photometers and Sky Radiance Sensors." NASA Tech Memo 2002-210004, Rev 3, Vol 1, NASA Goddard Space Flight Center, Greenbelt, Maryland, 76-90.

    Miller, D. J., Z. Zhang, S. Platnick, et al. A. S. Ackerman, F. Werner, C. Cornet, and K. Knobelspiesse. . "Comparisons of bispectral and polarimetric cloud microphysical retrievals using LES-Satellite retrieval simulator." Atmospheric Measurement Techniques Discussions, 1-38 (Submitted) [10.5194/amt-2017-325]

    Non-Refereed

    Mueller, J. L., C. Pietras, S. B. Hooker, et al. R. W. Austin, M. Miller, K. D. Knobelspiesse, R. Frouin, B. N. Holben, and K. Voss. 2003. "Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, Revision 4, Volume II: Instrument Specifications, Characterization, and Calibration." NASA/TM-2003-211621/Rev4-Vol II NASA Goddard Space Flight Center, Greenbelt, Maryland, 57 pp.

    Mueller, J. L., A. Morel, R. Frouin, et al. C. Davis, R. Arnone, K. Carder, Z. P. Lee, R. G. Steward, S. B. Hooker, C. D. Mobley, S. McLean, B. N. Holben, M. Miller, C. Pietras, K. D. Knobelspiesse, G. S. Fargion, J. Porter, and K. Voss. 2003. "Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, Revision 4, Volume III: Radiometric Measurements and Data Analysis Protocols." NASA/TM-2003-211621/Rev4-Vol III NASA Goddard Space Flight Center, Greenbelt, Maryland, 57 pp.

    Fargion, G., B. A. Franz, E. Kwiatkowska, et al. C. Pietras, S. W. Bailey, J. Gales, G. Meister, K. Knobelspiesse, J. Werdell, and C. R. Mcclain. 2003. "SIMBIOS Program in Support of Ocean Color Missions: 1997-2003." Proc SPIE Int Soc Opt Eng 5155: San Diego, CA, 49-60.

    Fargion, G., B. A. Franz, E. Kwiatkowska, et al. C. Pietras, S. W. Bailey, J. Gales, G. Meister, K. Knobelspiesse, J. Werdell, C. R. Mc Clain, and G. Feldman. 2003. "SIMBIOS Project Data Processing and Analysis Results." NASA/TM-2003-211622 NASA Goddard Space Flight Center, Greenbelt, Maryland, 11841.

    Mueller, J. L., C. Pietras, S. B. Hooker, et al. D. K. Clark, A. Morel, R. Frouin, B. G. Mitchell, R. R. Bidigare, C. Trees, J. Werdell, G. S. Fargion, R. Arnone, R. W. Austin, S. W. Bailey, W. Broenkow, S. W. Brown, K. Carder, C. Davis, J. Dore, M. Feinholz, S. Flora, Z. P. Lee, B. N. Holben, B. C. Johnson, M. Kahru, D. M. Karl, Y. S. Kim, K. D. Knobelspiesse, C. R. Mc Clain, S. McLean, M. Miller, C. D. Mobley, J. Porter, R. G. Steward, M. Stramska, L. Van Heukelem, K. Voss, J. Wieland, M. A. Yarbrough, and M. Yuen. 2002. "Ocean Optics Potocols for Satellite Ocean Color Sensor Validation." NASA Tech Memo 2002-210004, Rev 3, Vol 1 NASA Goddard Space Flight Center, Greenbelt, Maryland, iii-iv.

    Brief Bio

    Kirk Knobelspiesse received an undergraduate degree in Photography from the Rochester Institute in Technolody in 1998, then a Master's degree in Imaging Science from the same university in 2000. For the next four years, he worked as a contractor at NASA GSFC on the SeaWiFS and SIMBIOS projects, then returned to graduate school at Columbia University in 2004. His PhD, in Applied Mathematics, dealt with remote sensing retrievals of atmospheric aerosols from multi-angle polarimeters. During his studies, he spent his time at NASA GISS, and remained at that institution for a Postdoctoral fellowship following graduation. He took a position at NASA Ames in 2012, and returned to NASA GSFC in 2016.

    Dr. Knobelspiesse investigates instrument systems for the optical remote sensing of parameters relevant to the Earth’s climate. This includes expertise in radiative transfer computations, algorithm development and validation with observations in the field. Specific areas of interest have been the polarimetric remote sensing of aerosols and clouds, and the atmospheric correction required for ocean color observations.

    Publications

    Refereed

    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]

    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]

    Harten, G. V., D. J. Diner, B. J. Daugherty, et al. B. E. Rheingans, M. A. Bull, F. C. Seidel, R. A. Chipman, B. Cairns, A. P. Wasilewski, and K. D. Knobelspiesse. 2018. "Calibration and validation of Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) polarization measurements." Applied Optics 57 (16): 4499 [10.1364/ao.57.004499]

    Miller, D. J., Z. Zhang, S. Platnick, et al. A. S. Ackerman, F. Werner, C. Cornet, and K. Knobelspiesse. 2018. "Comparisons of bispectral and polarimetric retrievals of marine boundary layer cloud microphysics: case studies using a LES–satellite retrieval simulator." Atmospheric Measurement Techniques 11 (6): 3689-3715 [10.5194/amt-11-3689-2018]

    Knobelspiesse, K., and S. Nag. 2018. "Remote sensing of aerosols with small satellites in formation flight." Atmospheric Measurement Techniques 11 (7): 3935-3954 [10.5194/amt-11-3935-2018]

    Segal-Rozenhaimer, M., D. J. Miller, K. Knobelspiesse, et al. J. Redemann, B. Cairns, and M. D. Alexandrov. 2018. "Development of neural network retrievals of liquid cloud properties from multi-angle polarimetric observations." Journal of Quantitative Spectroscopy and Radiative Transfer 220 39-51 [10.1016/j.jqsrt.2018.08.030]

    Neukermans, G., T. Harmel, M. Galí, et al. N. Rudorff, J. Chowdhary, O. Dubovik, C. Hostetler, Y. Hu, C. Jamet, K. Knobelspiesse, Y. Lehahn, P. Litvinov, A. M. Sayer, B. Ward, E. Boss, I. Koren, L. A. Miller, J. W. Deming, and K. Arrigo. 2018. "Harnessing remote sensing to address critical science questions on ocean-atmosphere interactions." Elem Sci Anth 6 [10.1525/elementa.331]

    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]

    Burton, S. P., E. Chemyakin, X. Liu, et al. K. Knobelspiesse, S. Stamnes, P. Sawamura, R. H. Moore, C. A. Hostetler, and R. A. Ferrare. 2016. "Information content and sensitivity of the 3<i>β</i>&thinsp;+ 2<i>α</i> lidar measurement system for aerosol microphysical retrievals." Atmospheric Measurement Techniques 9 (11): 5555-5574 [10.5194/amt-9-5555-2016]

    Alexandrov, M. D., B. Cairns, A. P. Wasilewski, et al. A. S. Ackerman, M. J. McGill, J. E. Yorks, J. E. Hlavka, S. E. Platnick, G. T. Arnold, B. van Diedenhoven, J. Chowdhary, M. Ottaviani, and K. D. Knobelspiesse. 2015. "Liquid water cloud properties during the Polarimeter Definition Experiment (PODEX)." Remote Sens. Environ. 169 20-36 [doi:10.1016/j.rse.2015.07.029]

    Knobelspiesse, K., B. Van Diedenhoven, A. Marshak, et al. S. Dunagan, B. N. Holben, and I. Slutsker. 2015. "Cloud thermodynamic phase detection with polarimetrically sensitive passive sky radiometers." Atmos. Meas. Tech 8 1537-1554 [10.5194/amt-8-1537-2015]

    Russell, P. B., M. Kacenelenbogen, J. M. Livingston, et al. O. P. Hasekamp, S. P. Burton, G. L. Schuster, M. S. Johnson, K. D. Knobelspiesse, J. Redemann, S. Ramachandran, and B. N. Holben. 2014. "A multiparameter aerosol classification method and its application to retrievals from spaceborne polarimetry." J. Geophys. Res. Atmos. 119 (16): 9838–9863 [10.1002/2013JD021411]

    Knobelspiesse, K., B. Cairns, H. T. Jethva, et al. M. Kacenelenbogen, M. Segal-Rosenheimer, and O. Torres. 2014. "Remote sensing of above cloud aerosols." Light Scattering Reviews 9 167-210

    Ottaviani, M., K. Knobelspiesse, B. Cairns, and M. Mishchenko. 2013. "Information content of aerosol retrievals in the sunglint region." Geophys. Res. Lett. 40 (3): 631-634 [10.1002/grl.50148]

    Zhai, P., Y. Hu, C. A. Hostetler, et al. B. Cairns, R. A. Ferrare, K. D. Knobelspiesse, D. B. Josset, C. R. Trepte, P. L. Lucker, and J. Chowdhary. 2013. "Uncertainty and interpretation of aerosol remote sensing due to vertical inhomogeneity." J Quant Spectrosc Radiat Transfer 114 91-100 [10.1016/j.jqsrt.2012.08.006]

    Ottaviani, M., B. Cairns, J. Chowdhary, et al. B. van Diedenhoven, K. Knobelspiesse, C. Hostetler, R. Ferrare, S. Burton, J. Hair, M. D. Obland, and R. Rogers. 2012. "Polarimetric retrievals of surface and cirrus clouds properties in the region affected by the Deepwater Horizon oil spill." Remote Sens Environ 121 389-403 [10.1016/j.rse.2012.02.016]

    Knobelspiesse, K. D., B. Cairns, M. I. Mishchenko, et al. J. Chowdhary, K. Tsigaridis, B. Van Diedenhoven, W. Martin, M. Ottaviani, and M. D. Alexandrov. 2012. "Analysis of fine-mode aerosol retrieval capabilities by different passive remote sensing instrument designs." Opt. Express 20 (19): 21,457-21,484 [10.1364/OE.20.021457]

    Chowdhary, J., B. Cairns, F. Waquet, et al. K. Knobelspiesse, M. Ottaviani, J. Redemann, L. Travis, and M. Mishchenko. 2012. "Sensitivity of multiangle, multispectral polarimetric remote sensing over open oceans to water-leaving radiance: Analyses of RSP data acquired during the MILAGRO campaign." Remote Sens Environ 118 284-308 [10.1016/j.rse.2011.11.003]

    Knobelspiesse, K. D., B. Cairns, M. Ottaviani, et al. R. Ferrare, J. Hair, C. Hostetler, M. Obland, R. Rogers, J. Redemann, Y. Shinozuka, A. Clarke, S. Freitag, S. Howell, V. Kapustin, and C. McNaughton. 2011. "Combined retrievals of boreal forest fire aerosol properties with a polarimeter and lidar." Atmos. Chem. Phys. 11 (14): 7045-7067 [10.5194/acp-11-7045-2011]

    Knobelspiesse, K. D., B. Cairns, J. Redemann, R. W. Bergstrom, and A. Stohl. 2011. "Simultaneous retrieval of aerosol and cloud properties during the MILAGRO field campaign." Atmos. Chem. Phys. 11 (13): 6245-6263 [10.5194/acp-11-6245-2011]

    Waquet, F., B. Cairns, K. Knobelspiesse, et al. J. Chowdhary, L. D. Travis, B. Schmid, and M. I. Mishchenko. 2009. "Polarimetric remote sensing of aerosols over land." J. Geophys. Res. 114 (D1): D01206 [10.1029/2008JD010619]

    Knobelspiesse, K. D., B. Cairns, B. Schmid, M. O. Román, and C. B. Schaaf. 2008. "Surface BRDF estimation from an aircraft compared to MODIS and ground estimates at the Southern Great Plains site." J. Geophys. Res. 113 (D20): D20105 [10.1029/2008JD010062]

    Chu, D. A., L. A. Remer, Y. J. Kaufman, et al. B. Schmid, J. Redemann, K. Knobelspiesse, J. D. Chern, J. Livingston, P. B. Russell, X. Xiong, and W. Ridgway. 2005. "Evaluation of aerosol properties over ocean from Moderate Resolution Imaging Spectroradiometer (MODIS) during ACE-Asia." J. Geophys. Res. 110 (D7): D07308 [10.1029/2004JD005208]

    Wang, M., K. D. Knobelspiesse, and C. R. McClain. 2005. "Study of the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) aerosol optical property data over ocean in combination with the ocean color products." J. Geophys. Res. 110 (D10): D10S06 [10.1029/2004JD004950]

    Miller, M. A., K. Knobelspiesse, R. Frouin, et al. M. J. Bartholomew, R. M. Reynolds, C. Pietras, G. Fargion, P. Quinn, and F. Thieuleux. 2005. "Analysis of shipboard aerosol optical thickness measurements from multiple sunphotometers aboard the R/V Ronald H. Brown during the Aerosol Characterization Experiment - Asia." Applied Optics 44 (18): 3805 [10.1364/AO.44.003805]

    Knobelspiesse, K. D., C. Pietras, G. S. Fargion, et al. M. Wang, R. Frouin, M. A. Miller, A. Subramaniam, and W. M. Balch. 2004. "Maritime aerosol optical thickness measured by handheld sun photometers." Remote Sensing of Environment 93 (1-2): 87-106 [10.1016/j.rse.2004.06.018]

    Werdell, P. J., S. W. Bailey, G. Fargion, et al. C. Pietras, K. D. Knobelspiesse, G. Feldman, and C. McClain. 2003. "Unique data repository facilitates ocean color satellite validation." Eos, Transactions American Geophysical Union 84 (38): 377 [10.1029/2003EO380001]

    Knobelspiesse, K. D., C. Pietras, and G. S. Fargion. 2003. "Sun-Pointing Error Correction for Sea Deployment of the MICROTOPS II Handheld Sun Photometer." J Atmos Ocean Tech 20 (5): 767-772.

    Frouin, R., B. N. Holben, M. Miller, et al. C. Pietras, K. D. Knobelspiesse, G. S. Fargion, J. Porter, and K. Voss. 2003. "Sun and Sky Radiance Measurements and Data Analysis Protocols." NASA/TM-2003-211621/Rev4-Vol III 60-78

    Pietras, C., M. Miller, K. D. Knobelspiesse, et al. R. Frouin, B. N. Holben, and K. Voss. 2003. "Calibration of Sun Photometers and Sky Radiance Sensors." NASA/TM-2003-211621/Rev4-Vol II 34-49

    Knobelspiesse, K. D., C. Pietras, and G. S. Fargion. 2003. "Sun-Pointing-Error Correction for Sea Deployment of the MICROTOPS II Handheld Sun Photometer." J Atmos and Ocean Tech 20 (5): 767-771 [10.1175/1520-0426(2003)20<767:SPECFS>2.0.CO;2]

    Pietras, C., G. S. Fargion, and K. Knobelspiesse. 2003. "Investigation of Ocean Color Atmospheric Correction Algorithms Using In Situ Measurements of Aerosol Optical Thickness: Application to MODIS." NASA/TM-2003 41-46

    Frouin, R., B. N. Holben, M. Miller, et al. C. Pietras, K. D. Knobelspiesse, G. S. Fargion, J. Porter, and K. Voss. 2002. "Sun and Sky Radiance Measurements and Data Analysis Protocols." NASA Tech Memo 2002-210004 211-227

    Pietras, C., M. Miller, K. D. Knobelspiesse, et al. R. Frouin, B. N. Holben, and K. Voss. 2002. "Calibration of Sun Photometers and Sky Radiance Sensors." NASA Tech Memo 2002-210004, Rev 3, Vol 1 76-90

    Miller, D. J., Z. Zhang, S. Platnick, et al. A. S. Ackerman, F. Werner, C. Cornet, and K. Knobelspiesse. . "Comparisons of bispectral and polarimetric cloud microphysical retrievals using LES-Satellite retrieval simulator." Atmospheric Measurement Techniques Discussions (Submitted) 1-38 [10.5194/amt-2017-325]

    Non-Refereed

    Mueller, J. L., C. Pietras, S. B. Hooker, et al. R. W. Austin, M. Miller, K. D. Knobelspiesse, R. Frouin, B. N. Holben, and K. Voss. 2003. "Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, Revision 4, Volume II: Instrument Specifications, Characterization, and Calibration." NASA/TM-2003-211621/Rev4-Vol II 57 pp

    Mueller, J. L., A. Morel, R. Frouin, et al. C. Davis, R. Arnone, K. Carder, Z. P. Lee, R. G. Steward, S. B. Hooker, C. D. Mobley, S. McLean, B. N. Holben, M. Miller, C. Pietras, K. D. Knobelspiesse, G. S. Fargion, J. Porter, and K. Voss. 2003. "Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, Revision 4, Volume III: Radiometric Measurements and Data Analysis Protocols." NASA/TM-2003-211621/Rev4-Vol III 57 pp

    Fargion, G., B. A. Franz, E. Kwiatkowska, et al. C. Pietras, S. W. Bailey, J. Gales, G. Meister, K. Knobelspiesse, J. Werdell, and C. R. Mcclain. 2003. "SIMBIOS Program in Support of Ocean Color Missions: 1997-2003." Proc SPIE Int Soc Opt Eng 5155 49-60

    Fargion, G., B. A. Franz, E. Kwiatkowska, et al. C. Pietras, S. W. Bailey, J. Gales, G. Meister, K. Knobelspiesse, J. Werdell, C. R. Mc Clain, and G. Feldman. 2003. "SIMBIOS Project Data Processing and Analysis Results." NASA/TM-2003-211622 11841

    Mueller, J. L., C. Pietras, S. B. Hooker, et al. D. K. Clark, A. Morel, R. Frouin, B. G. Mitchell, R. R. Bidigare, C. Trees, J. Werdell, G. S. Fargion, R. Arnone, R. W. Austin, S. W. Bailey, W. Broenkow, S. W. Brown, K. Carder, C. Davis, J. Dore, M. Feinholz, S. Flora, Z. P. Lee, B. N. Holben, B. C. Johnson, M. Kahru, D. M. Karl, Y. S. Kim, K. D. Knobelspiesse, C. R. Mc Clain, S. McLean, M. Miller, C. D. Mobley, J. Porter, R. G. Steward, M. Stramska, L. Van Heukelem, K. Voss, J. Wieland, M. A. Yarbrough, and M. Yuen. 2002. "Ocean Optics Potocols for Satellite Ocean Color Sensor Validation." NASA Tech Memo 2002-210004, Rev 3, Vol 1 iii-iv

                                                                                                                                                                                            
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