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The presence of a systematic error in SDO/HMI data

机译:SDO / HMI数据中存在系统错误

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In this paper, we came to the conclusion that there is a systematic error in SDO/HMI (Helioseismic and Magnetic Imager aboard the Solar Dynamics Observatory) vector magnetic data, which reveals itself in a deviation from the radial direction of the knot magnetic fields manifesting themselves on magnetograms in the form of small grains in a strong magnetic field. This deviation demonstrates a dependence on the distance to the disk center, which cannot be a property of the magnetic field – it can only be artificially introduced into the data. We suggest a simple method for correcting vector magnetograms, which eliminates the detected systematic error.
机译:在本文中,我们得出的结论是,SDO / HMI(太阳动力学天文台上的Heleoismismic and Magnetic Imager)矢量磁数据存在系统误差,这表明其自身偏离了结磁场的径向方向,表明自身在强磁场中以小颗粒的形式出现在磁图上。这种偏差表明对磁盘中心的距离有依赖性,而这并不是磁场的属性,只能将其人工引入数据中。我们提出了一种校正矢量磁图的简单方法,该方法可以消除检测到的系统误差。

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