A 3-D Reconstruction Strategy for Small Solar Bodies with Single Flyby Spaceborne Radar

<p>Small solar body exploration is of great scientific significance in understanding the evolution of the solar system. However, most of the small bodies are far away from the earth, and the small size, weak gravity, irregular shape, and high speed rotation further increase the difficulty of exploring a small body. In order to characterize as many targets as possible in one mission, we propose a novel 3-D imaging strategy to reconstruct 3-D shape of the rapidly spinning small bodies in flyby trajectories. Firstly, we establish an observation model and analyze the imaging geometry and the characteristics of the signal. Then we describe in detail of the reconstruction procedure, and propose a modified algorithm to improve the imaging quality. Finally, we present the simulated results to validate our proposed method.</p> <p><a href="https://zenodo.org/api/files/b6d2b3fc-96ae-47af-9289-b369c031996a/ryugu.stl?versionId=1c758c95-a883-4e16-afae-b44461e0d6e8">ryugu.stl</a>&nbsp;is&nbsp;the scaling model for 3-D shape simulation.&nbsp;</p> <p><a href="https://zenodo.org/api/files/b6d2b3fc-96ae-47af-9289-b369c031996a/echodata.csv?versionId=102b451a-f208-4945-957a-04d1d9db908b">echodata.csv</a>&nbsp;are the echo data generated in&nbsp;forward simulation.</p> <p><a href="https://zenodo.org/api/files/b6d2b3fc-96ae-47af-9289-b369c031996a/recdata.zip?versionId=0fa554ad-b24b-48d7-b3df-f61083a07e1e">recdata.zip</a>&nbsp;are the original data of reconstructed results generated by the proposed algorithm.</p> <p>&nbsp;</p>