Lunar ground penetrating radar: Minimizing potential data artifacts caused by signal interaction with a rover body |
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Authors: | Michael Angelopoulos David Redman Wayne H Pollard Timothy W Haltigin Peter Dietrich |
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Institution: | 1. Department of Geography, McGill University, Montreal, Quebec H3A 2K6, Canada;2. Sensors & Software, Mississauga, Ontario L4W 2X8, Canada;3. Space Science & Technology, Canadian Space Agency, St. Hubert, Quebec J3Y 8Y9, Canada;4. MDA Space Missions, Brampton, Ontario L6S 4J3, Canada |
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Abstract: | Ground-penetrating radar (GPR) is the leading geophysical candidate technology for future lunar missions aimed at mapping shallow stratigraphy (<5 m). The instrument’s exploration depth and resolution capabilities in lunar materials, as well as its small size and lightweight components, make it a very attractive option from both a scientific and engineering perspective. However, the interaction between a GPR signal and the rover body is poorly understood and must be investigated prior to a space mission. In doing so, engineering and survey design strategies should be developed to enhance GPR performance in the context of the scientific question being asked. This paper explores the effects of a rover (simulated with a vertical metal plate) on GPR results for a range of heights above the surface and antenna configurations at two sites: (i) a standard GPR testing site with targets of known position, size, and material properties, and; (ii) a frozen lake for surface reflectivity experiments. Our results demonstrate that the GPR antenna configuration is a key variable dictating instrument design, with the XX polarization considered optimal for minimizing data artifact generation. These findings could thus be used to help guide design requirements for an eventual flight instrument. |
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Keywords: | Ground-penetrating radar Lunar rover Moon Polarization Surface reflectivity |
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