Investigation of wavelength-induced uncertainties in full-wave radar tomography of high contrast domain: An application to small solar system bodies

This paper aims to reconstruct the internal structure of a two-dimensional test object via numerically simulated full-wave time domain radar tomography with presence wavelength-induced (WI) uncertainties, following from complex structure, and diameters 21 or 64 times wavelength signal propagating inside target. In particular, we consider an application in planetary scientific studies reconstructing interior arbitrary high contrast small Solar System Body (SSSB), i.e., asteroid, probing limited by instrument mission payload requirements. Our uncertainty reduction model finds reconstruction averaging multiple inverse solutions assuming that WI deviations correspond random deviations, which assume be independent identically distributed (IID). It incorporates error marginalisation randomised configuration, spatial-averaging candidate solutions, frequency-based marginalisation, truncated singular value decomposition (TSVD) filtering technique, based on our assumptions phase discrepancy signal, parameters, forward model. The numerical experiments are performed for 20 60 MHz centre frequencies proposed CubeSat-based radars, latter being frequency Juventas Radar will aboard Hera investigate asteroid Dimorphos. A benchmark target was obtained spatial averaging, sparse point density configuration both systems.