Skip to Main content Skip to Navigation
Journal articles

Angular and radial sampling criteria for monostatic and bistatic radar tomography of solar system small bodies

Abstract : Low-frequency radar tomography is an important subsurface imaging method for future planetary missions to solar system small bodies. We derive angular and radial sampling criteria for monostatic and bistatic radar tomography algorithms that are based on monochromatic free-space backprojection and spherical apertures. We use the vector Born approximation to highlight the degeneracy of monochromatic bistatic source/receiver direction pair measurements in k-space. Analytical expressions are then derived for the scalar point target response of different spherical sampling geometries. We also derive the angular sampling step and total number of sampling points required to fully reconstruct the point target response for monostatic, bistatic, and non-degenerate k-space spherical apertures. These are evaluated for object sizes and radar operating frequencies expected in small body tomography. We also analyze and derive expressions for the coherence loss of spherical apertures due to random errors in a sensor's radial position, which provides requirements on the a posteriori ephemeris knowledge. Finally, we derive a vector backprojection algorithm suitable for focusing quad-pol scattering matrix (S-matrix) data that is tested using full-wave S-matrix simulations of dielectric point targets. This work is intended to aid radar instrument performance analysis and inform the design and architecture of future instruments and missions.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03705265
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Monday, June 27, 2022 - 2:24:41 PM
Last modification on : Tuesday, July 5, 2022 - 3:06:13 AM

File

1-s2.0-S0273117721006074-main....
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Mark S. Haynes, Ines Fenni, Yonggyu Gim, Wlodek Kofman, Alain Herique. Angular and radial sampling criteria for monostatic and bistatic radar tomography of solar system small bodies. Advances in Space Research, 2021, 68, pp.3903-3924. ⟨10.1016/j.asr.2021.07.035⟩. ⟨insu-03705265⟩

Share

Metrics

Record views

5

Files downloads

2