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<p>Following the legacy of the&#xa0;OCM series, OCM-3 onboard EOS-06 was launched on November 26, 2022 to cater the global needs with better accuracy. It has&#xa0;13 bands in VNIR (400–1010&#xa0;nm range) with ~ 1500&#xa0;km swath for monitoring the ocean. Basically, it operates in two modes, one is Local Area Coverage mode, i.e. 360&#xa0;m resolution and the&#xa0;second one is Global Area Coverage for global ocean in low resolution mode (1.1&#xa0;km) at regular cycles. Remote sensing reflectance derived from space using standard atmospheric correction, works very well in open ocean while the same approach fails in the optically complex waters, so to overcome this problem, 870&#xa0;nm was paired with 1010&#xa0;nm of OCM-3 instead of 780–870&#xa0;nm to recover the coastal radiometry basically at blue channels. They suffer a lot because of overestimation of atmospheric characterization at NIR channels and then extrapolated to blue channel during radiative transfer modeling. In addition, absorbing aerosols and coloured dissolved organic matter are equally responsible in the&#xa0;coastal region as well. The role of additional bands of ocean colour monitor (OCM-3) was discussed in this manuscript.</p>

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Role of Additional Bands in Ocean Colour Monitor (OCM) on Board EOS-06 in Arabian Sea Near Gujarat Coast

  • 期刊论文

  • 发表日期：

    2025年5月28日

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

摘要

Following the legacy of the OCM series, OCM-3 onboard EOS-06 was launched on November 26, 2022 to cater the global needs with better accuracy. It has 13 bands in VNIR (400–1010 nm range) with ~ 1500 km swath for monitoring the ocean. Basically, it operates in two modes, one is Local Area Coverage mode, i.e. 360 m resolution and the second one is Global Area Coverage for global ocean in low resolution mode (1.1 km) at regular cycles. Remote sensing reflectance derived from space using standard atmospheric correction, works very well in open ocean while the same approach fails in the optically complex waters, so to overcome this problem, 870 nm was paired with 1010 nm of OCM-3 instead of 780–870 nm to recover the coastal radiometry basically at blue channels. They suffer a lot because of overestimation of atmospheric characterization at NIR channels and then extrapolated to blue channel during radiative transfer modeling. In addition, absorbing aerosols and coloured dissolved organic matter are equally responsible in the coastal region as well. The role of additional bands of ocean colour monitor (OCM-3) was discussed in this manuscript.