relationship between the two base-pair coordinate frames

[zhao]

Hi Xiangjun:
     When we use 3DNA to analyze the tertiary structure of RNA, we get the local base pair parameters and simple base pair parameters, and know that different base-pair coordinate frames lead to different results. We would like to know what is the relationship between the two base-pair coordinate frames, but we have not found anything after searching. Could you help us solve this problem?

Zhao