A Far-Field Inversion Approach for the Deep Interior Scanning CubeSat
arXiv: Instrumentation and Methods for Astrophysics(2017)
摘要
This study aims at advancing mathematical and computational techniques for reconstructing the interior structure of a near earth asteroid (NEA) via Computed Radar Tomography (CRT). We introduce a far-field model for full-wave CRT and validate it numerically for sparse and limited-angle data and an orbiting distance of 5-10 km. As a potential future application of the proposed method, we consider the Deep Interior Scanning CUbeSat (DISCUS) concept in which two small spacecraft carrying a bistatic Radar localize internal macropores inside a rubble pile asteroid. The results suggest that the interior structure of a NEA with a typical spin can be reconstructed using spacecraft without the need to change the orbital plane of the spacecraft.
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