Auto-extraction of space debris features based on autofocus search and inverse Radon transform

A method for automatic and accurate feature extraction of space debris is proposed. The echo model of space debris in orbit is formulated first. Then an autofocus search method is presented to obtain the Doppler signature of space debris based on the predicted orbit. The inverse Radon transform (IRT) is used to automatically extract features of space debris. The extraction of spin periods is considered as an example to illustrate the effectiveness of the proposed method. Quantitative simulation results prove that estimated parameter is sufficient in accuracy.

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