论文标题

鲁滨天文台遗产时空调查避免卫星星座

Satellite Constellation Avoidance with the Rubin Observatory Legacy Survey of Space and Time

论文作者

Hu, Jinghan Alina, Rawls, Meredith L., Yoachim, Peter, Ivezić, Željko

论文摘要

我们研究了一种新型的卫星回避策略,以减轻低地球轨道上大型商业卫星星座对Vera C. Rubin C. Rubin C. Rubin天文台遗产的影响(LSST)。我们模拟当前计划的星条链接和OneWeb星座的轨道($ \ sim $ 40,000卫星),以测试有效升级的Rubin Scheduler算法可以避免它们的方式,并评估整体调查的影响。鉴于相当准确的卫星轨道预测,我们发现可以调整调度程序算法以有效避免使用某些卫星。总体而言,牺牲了10%的LSST观察时间以避免卫星会减少LSST访问的比例,而条纹则减少了两倍。是否需要这种缓解措施取决于条纹对科学的总体影响,这尚未得到充分量化。这是由于缺乏有关卫星亮度分布的足够信息,以及在宇宙参数估计中闪烁和低表面亮度残差对警报纯度和系统错误的影响。鲁宾操作中卫星数量或其亮度的大幅增加可能会使实施这种卫星避免策略值得。

We investigate a novel satellite avoidance strategy to mitigate the impact of large commercial satellite constellations in low-Earth orbit on the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). We simulate the orbits of currently planned Starlink and OneWeb constellations ($\sim$40,000 satellites) to test how effectively an upgraded Rubin scheduler algorithm can avoid them, and assess how the overall survey is affected. Given a reasonably accurate satellite orbit forecast, we find it is possible to adjust the scheduler algorithm to effectively avoid some satellites. Overall, sacrificing 10% of LSST observing time to avoid satellites reduces the fraction of LSST visits with streaks by a factor of two. Whether such a mitigation will be required depends on the overall impact of streaks on science, which is not yet well quantified. This is due to a lack of adequate information about satellite brightness distributions as well as the impact of glints and low surface brightness residuals on alert purity and systematic errors in cosmological parameter estimation. A significant increase in the number of satellites or their brightness during Rubin Operations may make implementing this satellite avoidance strategy worthwhile.

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