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<p>Ocean color radiometry at the top of the atmosphere includes water-leaving radiance modulated by atmospheric absorption and scattering from gases and particles. Phytoplankton pigments, total suspended matter and the vertical diffuse attenuation coefficient drive spectral variations in remote sensing reflectance (Rrs), retrievable via dark pixel approximation in OCM-3’s NIR channels using well-known radiative transfer model. OCM-3 data over the Arabian Sea yields remote sensing reflectance (Rrs) retrievals across 412–710&#xa0;nm (R²=0.64, RMSE = 0.003, bias = 0.0007&#xa0;sr⁻¹). Chl-a (mg/m<sup>3</sup>) concentrations perform well in the Arabian Sea (R²=0.40, RMSE = 0.09 mg/m<sup>3</sup>, bias = 0.15&#xa0;mg m⁻³) and Bay of Bengal (R²=0.61, RMSE = 0.13 mg/m<sup>3</sup>, bias = 0.18&#xa0;mg m⁻³), supporting essential climate variables. These products enable global monitoring of potential fishing zones, harmful algal blooms, coastal systems, and marine ecosystems. The Indian Ocean study area demonstrates the readiness of OCM-3 on board EOS-06 for such operational needs.</p>

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Initial verification of OCM-3 Derived Results and Expectations for Essential Climate Variables

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Anurag Gupta,
  • Debojyoti Ganguly,
  • Syed Moosa Ali,
  • K. N. Babu,
  • Mini Raman,
  • Pradeep Thapliyal,
  • Rashmi Sharma

摘要

Ocean color radiometry at the top of the atmosphere includes water-leaving radiance modulated by atmospheric absorption and scattering from gases and particles. Phytoplankton pigments, total suspended matter and the vertical diffuse attenuation coefficient drive spectral variations in remote sensing reflectance (Rrs), retrievable via dark pixel approximation in OCM-3’s NIR channels using well-known radiative transfer model. OCM-3 data over the Arabian Sea yields remote sensing reflectance (Rrs) retrievals across 412–710 nm (R²=0.64, RMSE = 0.003, bias = 0.0007 sr⁻¹). Chl-a (mg/m3) concentrations perform well in the Arabian Sea (R²=0.40, RMSE = 0.09 mg/m3, bias = 0.15 mg m⁻³) and Bay of Bengal (R²=0.61, RMSE = 0.13 mg/m3, bias = 0.18 mg m⁻³), supporting essential climate variables. These products enable global monitoring of potential fishing zones, harmful algal blooms, coastal systems, and marine ecosystems. The Indian Ocean study area demonstrates the readiness of OCM-3 on board EOS-06 for such operational needs.