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Moderate-resolution imaging spectroradiometer ocean color polarization correction.

Gerhard Meister1, Ewa J Kwiatkowska, Bryan A Franz

  • 1Futuretech Corporation, Greenbelt, Maryland 20770, USA. meister@simbios.gsfc.nasa.gov

Applied Optics
|September 16, 2005
PubMed
Summary

Accurate ocean color data from Moderate-Resolution Imaging Spectroradiometer (MODIS) satellites requires polarization correction. This study details the polarization correction process, significantly improving data accuracy for satellite oceanography.

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Area of Science:

  • Earth Observation
  • Oceanography
  • Remote Sensing

Background:

  • Polarization of light affects satellite radiance measurements.
  • Accurate ocean color data is crucial for understanding marine ecosystems and climate.
  • Moderate-Resolution Imaging Spectroradiometer (MODIS) instruments require polarization correction for precise data.

Purpose of the Study:

  • To describe the polarization correction for MODIS instruments.
  • To detail prelaunch polarization characterization and coefficient derivation for ocean color data processing.
  • To demonstrate the impact of polarization correction on satellite-derived ocean color.

Main Methods:

  • Prelaunch characterization of MODIS instrument polarization sensitivity.
  • Derivation of polarization correction coefficients.

Related Experiment Videos

  • Application of corrections to top-of-atmosphere and water-leaving radiances.

    • Main Results:

    • Top-of-atmosphere radiances require corrections up to 3.2% in the 412 nm band.
    • Water-leaving radiances can be affected by over 50% without correction.
    • Polarization correction ensures good agreement between MODIS Aqua and SeaWiFS data.

    Conclusions:

    • Polarization correction is essential for accurate MODIS ocean color data.
    • The applied correction method validates MODIS Aqua data against independent sensors.
    • Improved data accuracy supports reliable satellite oceanography and climate studies.