Image of the solar corona, taken by the SECCHI outer coronagraph (COR2) on the STEREO Behind observatory
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color on the difference image indicates the position of the leading edge.
color on the difference image indicates an approximate outline to the leading edge that was created using a segmentation technique.
Time_Diff - The time difference used in making the running difference image.
PAs - The position angles detection, each pair represents the starting and ending position angles of a CME.
Height - The height of each CME detection in the current frame corresponding to each position angle pair.