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Development of a Compact Water Activity Sensor System for Planetary Exploration
Planetary and Space Science ( IF 2.4 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.pss.2020.105132
Prarthana P. Desai , Ilka Schmueser , Coinneach M. Mackenzie Dover , Ian Underwood , Charles S. Cockell

Abstract Water is a fundamental requirement for life. Its biological availability is partly determined by water activity and thus measuring this parameter is vital in industries such as food, agriculture and beyond. Apart from its terrestrial applications, water activity is also important in planetary exploration, for example in determining habitability in the subsurface of Mars, icy moons and other regions of interest in the Solar System. This paper reports a miniaturized water activity sensor for measurement in planetary environments. In line with space instrumentation constraints, objectives included minimizing the weight and dimensions of the sensor system, lowering the power consumption, enabling smaller sample volumes and achieving faster measurement time. We describe the design, construction, testing and field validation of this instrument.

中文翻译:

用于行星探索的紧凑型水分活度传感器系统的开发

摘要 水是生命的基本需求。它的生物可用性部分取决于水分活度,因此测量该参数对于食品、农业等行业至关重要。除了在陆地上的应用外,水活动在行星探索中也很重要,例如在确定火星地下、冰冷卫星和太阳系其他感兴趣区域的宜居性方面。本文报告了一种用于在行星环境中进行测量的微型水活度传感器。根据空间仪器限制,目标包括最小化传感器系统的重量和尺寸、降低功耗、实现更小的样品体积和实现更快的测量时间。我们描述了该仪器的设计、构造、测试和现场验证。
更新日期:2021-01-01
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