At the equator, take a horizontal segment corresponding to the rotation distance to be covered by the current image, centered on the current time. For each increment in latitude, take the horizontal component of the rotation distance at that latitude and expand to the width of the component at the equator. This results in a Mercator projection of the heliosphere. Use a maximum of one image per column. EIT maps are 720x512 pixels.
Time moves from right to left.
White bars at top of map indicate missing data. Latitudinal resolution is 1.0 . Horizontal streaks may be due to interpolation. Data Gaps are filled with a constant value if over 1.5 days. Click here for example.