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Fig. 1

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Example of the simulated VIS data. The left image shows a quadrant of a raw CCD file with a size of 2048 × 2066 pixels (204.8 × 206.6 arcsec). Asteroids are marked with red circles. The other streaks are simulated cosmic rays. On the right is the same image after removing cosmic rays. The dark objects above asteroids C and D are galaxies, the circle below asteroid E is a ghost reflection of a bright star, and the spot further down with six outward lines is a star with diffraction spikes. Streaks A, B, F, H, and J are quite bright and easily seen (magnitudes 20.3–22.2), while C, D, E, and G are fainter and harder to see (magnitudes 22.6–23.9), and finally, streak I is practically invisible (magnitude 25.0). The velocities range from 14 arcsech−1 (asteroid B) to 56 arcsech−1 (asteroid D).

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