The Mars Science Laboratory rover (Curiosity) has monitored the line‐of‐sight extinction within Gale Crater since mission sol 100 (16 November 2012, MY 31 L_s 208°) with Navcam and since mission sol 1,187 (8 December 2015, MY 33 L_s 79°) with the color imager, Mastcam. This work reports 1,375 sols (>2 MYs) of line‐of‐sight extinction monitoring within Gale Crater with Mastcam and updates the Navcam line‐of‐sight extinction record to sol 2,556 (15 October 2019, MY 35 L_s 93°). A cyclical pattern with one or more peaks in the dusty season (L_s ∼180–360°) and a trough in the less‐dusty season (L_s ∼0–180°) was observed with both imagers and the results from Mastcam red and Navcam agree well. Green and blue filter Mastcam data show generally lower extinction than in the red filter data. Extinction as a function of azimuth and elevation angle were investigated and the extinction as a function of azimuth was generally found to be smooth and thus the dust well‐mixed horizontally. The extinction as a function of elevation shows increased dust loading at lower elevations during dusty seasons, indicative of dust lifting from the base of the crater.

中文翻译：

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MSL的Mastcam和Navcam通过约2500个Sols观测到的大风火山口的视线灭绝记录

火星科学实验室流动站（好奇心），因为任务溶胶一直监测盖尔火山口内的线的视线消光100（2012 11月16日，MY 31大号_小号208°）Navcam并且由于任务溶胶1187（2015年12月8日，MY 33大号_小号79°）与彩色成像器，MASTCAM。这项工作报告了使用Mastcam在Gale Crater中进行的1,375溶胶（> 2 MYs）视线灭绝监测并将Navcam的视线灭绝记录更新为sol 2,556（2019年10月15日，MY 35 L _s 93°）。周期性图案与一个或多个峰在尘土飞扬的季节（大号_小号 〜 180-360°），并在无尘少季节的槽（大号_小号 〜两种成像仪均观察到0-180°），Mastcam red和Navcam的结果非常吻合。绿色和蓝色滤镜Mastcam数据显示的消光比红色滤镜数据低。研究了消光与方位角和仰角的关系，发现消光与方位角的关系是平滑的，因此粉尘在水平方向上充分混合。海拔高度的变化表明，在尘土飞扬的季节，较低海拔的尘埃负荷增加，表明尘埃从火山口底部抬起。