SXT Smoothies !
Yohkoh/SXT smoothly-running coronal movies (1991-2001).
Yohkoh/SXT smoothly-running coronal movies ("SXT smoothies") are
made of full-Sun coronal images processed from SXT Level_3 data
obtained with the Yohkoh satellite.
While our Level_3 data are already highly processed products
(e.g., co-aligned composite images in logarithmic intensity scale),
"SXT smoothies" are additionaly processed to enhance visual impact.
The main features are as follows:
Original idea of this technique was developed by a group of students
(supervised by Prof. K. Shibata) at Kyoto University, Japan, and
was improved at MSU. We currently provide our products in the Mpeg4
format with music. Here are links to the page providing our product.
- To improve the S/N, each frame was created by superposing 6 to 8
images taken closely in time and differencially rotated back and forth
to match the observing time of the selected frame.
- To run smoothly, the movie frames are interpolated to a uniform
time grid, except when there is a data gap longer than one day.