{
  "id": 6369712,
  "title": "A vicarious calibration model enables quantitative applications of Fengyun-3 satellite ocean color data",
  "url": "https://urgent.news/2026/09/09/a-vicarious-calibration-model-enables-quantitative-applications-of",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-09T02:20:02.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-09-vicarious-calibration-enables-quantitative-applications.html"
  },
  "original_language": "en",
  "account": "The vicarious calibration model, developed by a Chinese research team, enables precise quantitative applications of Fengyun-3 satellite ocean color data. This advancement addresses the limitations presented by insufficient on-orbit sensor calibration and atmospheric interference, which have introduced significant biases in observing weak ocean signals. By leveraging high-precision ground-based observations and integrating radiative transfer simulations with regression analysis, the model corrects radiometric biases in the ocean color channels of the Fengyun-3D (FY-3D) and Fengyun-3F (FY-3F) satellites. This correction process effectively separates atmospheric path radiance from water-leaving radiance, enhancing the accuracy of retrieved remote-sensing reflectance. The improved data quality will bolster quantitative applications of Chinese satellite ocean color data, as demonstrated by the study published in Atmospheric and Oceanic Science Letters.",
  "summary": "Ocean color remote sensing is a vital tool for monitoring global ocean carbon sinks and primary productivity. However, the on-orbit calibration accuracy of satellite sensors is insufficient, and weak marine signals account for only approximately 10% of the signals received by satellites, leading to significant uncertainties in ocean color remote-sensing applications.",
  "key_points": [
    "Vicarious calibration model developed by Chinese research team",
    "Addresses sensor calibration and atmospheric interference issues",
    "Enhances accuracy of Fengyun-3D and Fengyun-3F satellite data"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}