I have been studying the relation between the I Ching and Sabian symbols for about ten years. 
The research started when I was around 20 years old. 
At that time, I had already studied astrology and I Ching for about two years. 
However, I lacked practical experience and knowledge about it yet. 
Therefore, it was only one method that I understood the relation between 64 hexagrams and Sabian symbols. It links "Zodiac signs(12 constellations)" and "
Earler Heaven Bagua".
About a year after that, I noticed another perspective. 
I understood it in an intuitive way during practice of "Kimon Tonkou". 
"Kimon Tonkou(
Qi Men Dun Jia)" is a technology that uses nine spaces where complex elements are included. 
In that experience, I obtained a new viewpoint that connected astrology with the I Ching. That viewpoint linked "
Later Heaven Bagua(
King Wen sequence)" and "Zodiac signs". 
Afterwards, I found the third viewpoint in 2004. 
This can arrange one degree to one hexagram's Horizontal Line. 
By these findings, I now can interpret the I Ching multilaterally. 
Current study results are in my website. 
http://ciarchives.nemachinotsuki.com/i-ching_sabian.html 
However, my website is written in Japanese, so I made two English versions.