In the image, one coronal hole appears near the top center of the sun while another one — a polar coronal hole — is visible near the bottom of the view.
在这个图片里，一个日冕出现太阳中心的顶部附近，而另一个与之相对的日冕，出现在视野的底部附近。
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Geometric distortion in 5 different fields of view (FOV) was calculated by measuring the absolute borderline error of direct scan and coronal digital reconstructed radiograph (DRR).