Continuous Solar Observations from the Ground—Assessing Duty Cycle from GONG Observations
Continuous Solar Observations from the Ground—Assessing Duty Cycle from GONG Observations
复制标题
地面连续太阳观测——根据 GONG 观测评估占空比
DOI：
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发表时间：
2021
影响因子：
3.5
通讯作者：
A. Pevtsov
中科院分区：
文献类型：
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作者：
K. Jain;S. Tripathy;F. Hill;A. Pevtsov
连续观测在太阳变率研究中占有重要地位。虽然这样的观测可以从空间以几乎100%的占空比实现，但是从地面实现非常高的占空比是困难的。在这种情况下，我们评估的占空比，已经实现了从地面上通过分析观测的六站网络相同的仪器，全球振荡网络组（贡）。我们提供了一个详细的分析，使用龚观察跨越18年的占空比。我们还讨论了各个站点的占空比，并指出了可能影响各个站点或网络占空比的各种因素。网络的平均占空比为93%，但在所有图像通过严格的质量控制检查后，占空比降低了约5%。每月和每年的占空比值的标准偏差被发现分别为1.9%和2.2%。这些结果提供了一个基线，可用于规划未来的地面网络。
Continuous observations play an important role in the studies of solar variability. While such observations can be achieved from space with an almost 100% duty cycle, it is difficult to accomplish a very high duty cycle from the ground. In this context, we assess the duty cycle that has been achieved from the ground by analyzing the observations of a six station network of identical instruments, the Global Oscillation Network Group (GONG). We provide a detailed analysis of the duty cycle using GONG observations spanning over 18 yr. We also discuss the duty cycle of individual sites and point out various factors that may impact individual site or network duty cycles. The mean duty cycle of the network is 93%, however it reduces by about 5% after all images pass through the stringent quality-control checks. The standard deviations in monthly and yearly duty cycle values are found to be 1.9% and 2.2%, respectively. These results provide a baseline that can be used in the planning of future ground-based networks.