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Kilometer-level Laser Reflective Tomography Experiment and Debris Barycenter Estimation

Removal of the numerous centimeter-level space debris in low Earth orbit using high-power lasers is always a hot topic of international academic research. Specifically, precise positioning of space debris and high-precision measurement of barycenter range of debris are the key points and worldwide problems that need solutions. As a new remote high-resolution imaging method, laser reflective tomography is an effective approach to detect dark targets in remote space with its imaging resolution independent of the detection range. Hence, a centimeter-level space debris barycenter model was established according to the principle of laser reflective tomography in order to analyze the relative movement of debris and detector. On this basis, an approach to estimate the barycenter range of centimeter-level space debris was proposed to carry out the experimental verification of 1km detection range laser reflective tomography. The experimental results show that this method can improve the accuracy of barycenter detection from 1.50cm to 0.34cm, which is an effective measure for realizing high-precision measurement of barycenter ranges of centimeter-level space debris. More than that, this study achieving a breakthrough in kilometer-level laser reflective tomography experiments and theory of validation , and have great application prospect and technical potential.