Fig. 1. Optical path layout of SHIS

Fig. 2. Principle of target interference data acquisition

Fig. 3. Spectrum mixing and classification of adjacent targets. (a) Target spectrum mixing; (b) four kinds of situations of target spectrum mixing

Fig. 4. Absorption spectrum of CO₂

Fig. 5. Results of simulation 1. (a) Image at 100^th frame; (b) image at 200^th frame; (c) image at 300^th frame; (d) image at 400^th frame

Fig. 6. Results of simulation 2. (a) Target interferogram of 470^th column; (b) interference data of two targets

Fig. 7. Surface reflectance data

Fig. 8. Statistical results of surface reflectance differences. (a) Inland China; (b) Yangtze River Delta

Fig. 9. Difference range of surface reflectance of 98% targets in sample range varying with spatial resolution

Fig. 10. Vibration curves of satellite platform under different spatial resolutions. (a) Spectral dimension; (b) spatial dimension

Fig. 11. Deviation and relationship among interference data, recovery data, and ideal data. (a) Comparison between interference data with error and ideal data; (b) deviation and comparison between recovery data with error and ideal data

Fig. 12. Relationship between recovery RQE and surface reflectance difference

Fig. 13. Comparison of mixed target spectral data and ideal data under different f_z/f_c. (a) f_z/f_c=0.2; (b) f_z/f_c=1.0

Fig. 14. Relationship between recovery RQE and surface reflectance difference at different f_z/f_c