Two-Dimensional Imaging Algorithm of Asteroid Tomography Based on Filtered Inverse Projection

This article explores an asteroid tomography two- dimensional imaging algorithm based on filtered back- projection to meet the needs for future research on small celestial body internal resources. Considering that during a satellite's flyby of an asteroid, their motion relationship meets the ISAR turntable imaging conditions, analyzing the principles and performance of turntable target imaging is of great significance. This paper first establishes a turntable target echo signal model based on the principle of motion relativity. Then it deduces in detail the process of two-dimensional target imaging based on the filtered back-projection algorithm, and utilizes this algorithm to graphically reconstruct a simulated target through establishing a simulation model. This method realizes the display of the two-dimensional internal texture of an asteroid during a satellite's flyby, providing a technical basis for resource exploration.