Fig. 1. Earth observation method of spectrometer

Fig. 2. Astronomical sky image with Smear effect

Fig. 3. Working principle of ground test system

Fig. 4. Schematic diagram of CCD

Fig. 5. Images processed without and with algebraic algorithm

Fig. 6. Comparison of pixel value before and after Smear removal

Fig. 7. Spectrum of xenon lamp

Fig. 8. Spectrum before Smear removal

Fig. 9. Spectrum after Smear removal

Fig. 10. Comparison of pixel value before and after Smear removal

Fig. 11. Overall flowchart of Smear removal algorithm