Localization and physical property experiments conducted by opportunity at Meridiani Planum
Localization and physical property experiments conducted by opportunity at Meridiani Planum
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DOI：
10.1126/science.1104211
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发表时间：
2004-12-03
期刊：
影响因子：
56.9
通讯作者：
Wilson, J
中科院分区：
文献类型：
--
作者：
Arvidson, RE;Anderson, RC;Wilson, J
通过对无线电跟踪数据的分析，确定了机遇号着陆点的绝对精度超过10米。我们通过工程遥测和重叠图像确定了漫游车的位置，误差小到几厘米。由火星车数据生成的地形剖面显示，从米到厘米的尺度来看，平原非常光滑，这与轨道观测的分析结果一致。由于空气中的灰尘沉积在电池板上，太阳能电池的输出下降。子午线平原表面缺乏尘埃覆盖表明，高速风必须不断地将这些物质吹走。研磨实验表明，蒸发岩的机械强度较低，表面颗粒粗，表明子午线平原受到不同程度的侵蚀。
The location of the Opportunity landing site was determined to better than 10-m absolute accuracy from analyses of radio tracking data. We determined Rover locations during traverses with an error as small as several centimeters using engineering telemetry and overlapping images. Topographic profiles generated from rover data show that the plains are very smooth from meter- to centimeter-length scales, consistent with analyses of orbital observations. Solar cell output decreased because of the deposition of airborne dust on the panels. The lack of dust-covered surfaces on Meridiani Planum indicates that high velocity winds must remove this material on a continuing basis. The low mechanical strength of the evaporitic rocks as determined from grinding experiments, and the abundance of coarse-grained surface particles argue for differential erosion of Meridiani Planum.