Fig. 1. Flow chart of algorithm

Fig. 2. Interaction between solar radiation and atmosphere

Fig. 3. Spectral response function of GF-1 WFV3

Fig. 4. Daily average data of atmospheric AOD from MODIS

Fig. 5. Images before and after atmospheric correction. (a) Before correction; (b) after correction

Fig. 6. Comparison of typical features spectral curves. (a) Water; (b) vegetation; (c) building; (d) land

Fig. 7. Typical region before correction. (a) Region Ⅰ; (b) region Ⅱ; (c) region Ⅲ

Fig. 8. Typical region after correction. (a) Region Ⅰ; (b) region Ⅱ; (c) region Ⅲ

Fig. 9. Selection of uniform image blocks before correction

Fig. 10. Selection of uniform image blocks after correction

Fig. 11. SNR of Chaohu. (a) Band1; (b) Band2; (c) Band3; (d) Band4