Monitoring the performance of the Fengyun satellite instruments using radiative transfer models and NWP fields

•The principle of Fengyun satellite data monitoring using RTMs and NWP is introduced and analyzed.•The design and implementation of Fengyun satellite instrument monitoring schemes are introduced for the first time.•The examples of Fengyun satellite instruments monitoring with the tool of RTM-based diagnosis given in this article, include not only the IR and MW band instrument, but also the VIS-NIR band instrument.