AI Summary

Researchers have introduced a vicarious calibration model to improve the quantitative use of ocean color data from China’s Fengyun‑3D and Fengyun‑3F satellites, which carry Medium Resolution Spectral Imager sensors. The model addresses the “weak signal, strong interference” problem that hampers accurate on‑orbit calibration, where marine signals constitute only about 10 % of the total received signal. By providing a targeted calibration approach, the method aims to reduce uncertainties that currently limit monitoring of global ocean carbon sinks and primary productivity.

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