Fig. 1. The location of selected GIIRS FOV

Fig. 2. Flow chart of cloud detection

Fig. 3. （a）Weighting function peak and channel height, and （b）peak weighting function of three channels

Fig. 4. Statistical result of NEDR from GIIRS real-time data

Fig. 5. Bias of different FOV based on ranked channel height

Fig. 6. Cloud detection result at 0600 UTC 10 May 2019,（a） result after matching the AGRI CLM data,（b） cloud detection result, and （c） AGRI CLM data

Fig. 7. Cloud detection result at 1200 UTC 10 May 2019,（a） result after matching the AGRI CLM data,（b） cloud detection result, and （c） AGRI CLM data

Fig. 8. Cloud detection result at 0600 UTC 11 May 2019,（a） result after matching the AGRI CLM data,（b） cloud detection result, and （c） AGRI CLM data

Fig. 9. Cloud detection result at 1200 UTC 11 May 2019,（a） result after matching the AGRI CLM data,（b） cloud detection result, and （c） AGRI CLM data

Fig. 10. Cloud detection result at 0600 UTC 12 May 2019,（a） result after matching the AGRI CLM data,（b） cloud detection result, and （c） AGRI CLM data

Fig. 11. Cloud detection result at 1200 UTC 12 May 2019,（a） result after matching the AGRI CLM data,（b） cloud detection result, and （c） AGRI CLM data