Tristan Harmel
Post-doctoral Researcher (2011-2014)
Contact information:
Phone: +33 (0)4 93 76 39 11
Fax: +33 (0)4 93 76 38 39

Ph.D. in Physics and Remote Sensing (2006-2009)
Université Pierre et Marie Curie, Paris, France
Dissertation topic: Exploitation of multi-angular and polarization data for atmospheric correction over open ocean waters. Application to the PARASOL satellite mission

M. SC.Physical Fundamentals in Remote (2005-2006)
Université Pierre et Marie Curie, Paris, France
Dissertation topic: Detection of ionospheric signature induced by tsunami using transhorizon radar

Master degree in Ocean, Atmosphere, Climate and Remote Sensing  (2002-2003). Dissertation topic: Study on the ocean-atmosphere relationships at the small time scales for the fall period in the Ligurian Sea (DYNAPROC 2 project). Impacts on the water column.

Employment record:

Research Associate (2010-2011)
Optical Remote Sensing Laboratory of the City College of New York
Dissertation topic: (i) Validation and calibration Ocean Color Radiometry Satellite data; (ii) Data processing and algorithm development for in situ above-water measurements in coastal area (AERONET-OC plus hyperspectral measurements); (iii) Measurement and inversion techniques of the polarization field for IOPs and in-water constituent retrieval.

Research engineer (2009-2010)
ACRI-ST Company, Sophia-Antipolis, France
Dissertation topic: Data processing and analyzing of the MERIS, MODIS, SeaWiFS and PARASOL satellite missions related to atmospheric correction and water


Research interests:

Radiative transfer of polarized light in atmosphere-ocean system, Inversion algorithm: atmospheric correction, aerosol determination, Ocean Color Radiometry, Polarization Multi- and hyperspectral remote sensing, Above-water measurements, Satellite image analysis and method, Underwater visualization



  • Hlaing, S., T. Harmel, A. Gilerson, R. Foster, A. Weidemann, R. Arnone, M. Wang, and S. Ahmed (2013), Evaluation of the VIIRS ocean color monitoring performance in coastal regions, Remote Sensing of Environment, 139, 398-414, (Get PDF Reprint).
  • Harmel, T., and M. Chami (2013), Estimation of the sun glint radiance field from optical satellite imagery over open ocean: multidirectional approach and polarization aspects, Journal of Geophysical Research, 118, 1-15, doi:10.1029/2012JC008221. (Get PDF Reprint)
  • 2012

  • Harmel T. and M. Chami (2012). Determination of sea surface wind speed using the polarimetric and multidirectional properties of satellite measurements in visible bands. Geophysical Research Letters, Vol. 39, L19611, doi:10.1029/2012GL053508 (Get PDF Reprint).
  • Harmel, T., A. Gilerson, S. Hlaing, A. Weidemann, R. Arnone, and S. Ahmed (2012), Long Island Sound Coastal Observatory: assessment of above-water radiometric measurement uncertainties using collocated multi and hyper-spectral systems: reply to comment, Applied Optics, 51, 3893-3899. (Get PDF Reprint)
  • Harmel, T., A. Gilerson, A. Tonizzo, J. Chowdhary, A. Weidemann, R. Arnone and S. Ahmed (2012), Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements. Applied Optics, 51, 8324-8340. (Get PDF Reprint)
  • Hlaing, S., Gilerson, A., Harmel, T., Tonizzo, A., Weidemann, A., Arnone, R. and S. Ahmed (2012). Assessment of a bidirectional reflectance distribution correction of above-water and satellite water-leaving radiance in coastal waters, Applied Optics, 51, 220-237. (Get PDF Reprint).
  • Ibrahim, A., A. Gilerson, T. Harmel, A. Tonizzo, J. Chowdhary, and S. Ahmed (2012), The relationship between upwelling underwater polarization and attenuation/absorption ratio, Opt. Express, 20(23), 25662-25680. (Get PDF reprint)
  • 2011

  • Harmel T., and M. Chami (2011). Influence of polarimetric satellite data measured in the visible region on aerosol detection and on the performance of atmospheric correction procedure over open ocean waters. Optics Express, 19 (21), 20960-20983 (Get PDF Reprint)
  • 2008

  • Harmel, T., and M. Chami (2008). Invariance of polarized reflectance measured at the top of atmosphere by PARASOL satellite instrument in the visible range with marine constituents in open ocean waters. Optics Express, 16, 6064-6080. (Get PDF Reprint).


  • Harmel, T., A. Gilerson, S. Hlaing, A. Tonizzo, T. Legbandt, A. Weidemann, R. Arnone, and S. Ahmed, "Long Island Sound Coastal Observatory: Assessment of Above-water Radiometric Measurement Uncertainties Using Collocated Multi and Hyperspectral Systems," Appl. Opt. 50, 5842-5860 (2011).
  • Tonizzo, A., A. Gilerson, T. Harmel, A. Ibrahim, J. Chowdhary, B. Gross, F. Moshary, and S. Ahmed, "Estimating particle composition and size distribution from polarized water-leaving radiance," Appl. Opt. 50, 5047-5058 (2011).
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