In these images, the center of the image is the center of the sun, North is straight up at the top of the image. East is to the left. Solar coronal data taken with the Mk4 instrument exists from October 1998 to the present. All of the data from January 2000 to present has been calibrated and is available. These images of the corona are appropriate for display and morphological purposes.
Quantitative data are available via special request.