The ExoMars 2028 WISDOM antenna assembly: Description and characterization

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Planetary and Space Science Pub Date : 2024-11-15 DOI:10.1016/j.pss.2024.105995

Wolf-Stefan Benedix , Sebastian Hegler , Christoph Statz , Ronny Hahnel , Dirk Plettemeier , Valérie Ciarletti

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Abstract

While ground penetrating radars have been extensively researched on Earth, the high-resolution exploration and imaging of the shallow subsurface of celestial bodies in our solar system is still in its early stages, with only a handful of systems capable of the task.

Designing high-resolution radar systems can be a complex task due to the large frequency bandwidth required by the antennas to achieve high vertical resolution. The WISDOM GPR, as part of the 2028 ExoMars mission, is a highly capable and challenging instrument in this context, given its fully-polarimetric setup and mission constraints on the operating environment, robustness, as well as mass and size budget.

This paper outlines the development and characterization process of the WISDOM antenna assembly, which can serve as a model for future radar systems. Furthermore, it presents the results of the antenna characterization as the foundation for instrument calibration and optimal radar sounding outcomes.

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ExoMars 2028 WISDOM 天线组件：描述和特性

虽然地面穿透雷达在地球上已得到广泛研究，但对太阳系天体浅层次表面的高分辨率探测和成像仍处于早期阶段，只有少数几个系统能够胜任这一任务。由于天线需要较大的频率带宽才能实现较高的垂直分辨率，因此设计高分辨率雷达系统是一项复杂的任务。WISDOM GPR是2028年ExoMars任务的一部分，鉴于其全偏振设置和任务对运行环境、鲁棒性以及质量和尺寸预算的限制，它在这方面是一个极具能力和挑战性的仪器。本文概述了WISDOM天线组件的开发和表征过程，它可以作为未来雷达系统的模型。此外，本文还介绍了作为仪器校准和最佳雷达探测结果基础的天线鉴定结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research