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首页> 外文期刊>Journal of geophysical research. Planets >Terrain physical properties derived from orbital data and the first 360 sols of Mars Science Laboratory Curiosity rover observations in Gale Crater
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Terrain physical properties derived from orbital data and the first 360 sols of Mars Science Laboratory Curiosity rover observations in Gale Crater

机译：从轨道数据和大风火山口火星科学实验室好奇号火星车观测的前360个溶胶得出的地形物理特性

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Physical properties of terrains encountered by the Curiosity rover during the first 360 sols of operations have been inferred from analysis of the scour zones produced by Sky Crane Landing System engine plumes, wheel touch down dynamics, pits produced by Chemical Camera (ChemCam) laser shots, rover wheel traverses over rocks, the extent of sinkage into soils, and the magnitude and sign of rover-based slippage during drives. Results have been integrated with morphologic, mineralogic, and thermophysical properties derived from orbital data, and Curiosity-based measurements, to understand the nature and origin of physical properties of traversed terrains. The hummocky plains (HP) landing site and traverse locations consist of moderately to well-consolidated bedrock of alluvial origin variably covered by slightly cohesive, hard-packed basaltic sand and dust, with both embedded and surface-strewn rock clasts. Rock clasts have been added through local bedrock weathering and impact ejecta emplacement and form a pavement-like surface in which only small clasts (<5 to 10 cm wide) have been pressed into the soil during wheel passages. The bedded fractured (BF) unit, site of Curiosity's first drilling activity, exposes several alluvial-lacustrine bedrock units with little to no soil cover and varying degrees of lithification. Small wheel sinkage values (<1 cm) for both HP and BF surfaces demonstrate that compaction resistance countering driven-wheel thrust has been minimal and that rover slippage while traversing across horizontal surfaces or going uphill, and skid going downhill, have been dominated by terrain tilts and wheel-surface material shear modulus values.
机译：通过对“天鹤着陆系统”发动机羽流产生的冲刷区域，车轮触地动力学，化学照相机（ChemCam）激光照像产生的凹坑，火星车在岩石上行走，下沉到土壤中的程度以及行驶过程中基于火星车的滑移的大小和迹象。将结果与从轨道数据得出的形态，矿物学和热物理性质以及基于好奇心的测量结果进行了整合，以了解所遍历地形的物理性质和起源。丘陵平原（HP）的着陆点和穿越点由中度至固结度较高的冲积基岩组成，并被微粘性，硬堆积的玄武质沙尘覆盖，并带有嵌岩和表层岩石碎屑。通过局部基岩风化作用和冲击喷射作用添加了岩石碎屑，形成了类似于路面的表面，在车轮通过过程中，只有很小的碎屑（宽度<5至10 cm）被压入土壤。好奇号首次钻探活动的层状裂缝（BF）单元暴露了几个冲积湖相基岩单元，几乎没有土壤覆被，且石化程度不同。 HP和BF表面的车轮下沉值均较小（<1 cm），这表明抵抗从动轮推力的抗压实性极小，并且在横穿水平面或上坡时以及在下坡时滑行时，滑行已成为地形的主要因素倾斜度和车轮表面材料的剪切模量值。

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