# How to transfer the rotation relationship in chaser spacecraft coordinate system to host spacecraft camera coordinate system?

**URL:** <https://community.drivendata.org/t/how-to-transfer-the-rotation-relationship-in-chaser-spacecraft-coordinate-system-to-host-spacecraft-camera-coordinate-system/10556>\
**Category:** NASA Pose Bowl\
**Created:** [March 24, 2024, 6:31am UTC](https://community.drivendata.org/t/how-to-transfer-the-rotation-relationship-in-chaser-spacecraft-coordinate-system-to-host-spacecraft-camera-coordinate-system/10556 "2024-03-24T06:31:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![shaodong](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@shaodong](https://community.drivendata.org/u/shaodong)\
**Post date:** [March 24, 2024, 6:31am UTC](https://community.drivendata.org/t/how-to-transfer-the-rotation-relationship-in-chaser-spacecraft-coordinate-system-to-host-spacecraft-camera-coordinate-system/10556/1 "2024-03-24T06:31:41Z")

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Sorry, I am a beginner in this field. 😀

If I use feature point matching to calculate the rotation relationship R between adjacent frames, the calculated R should be based on the camera coordinate system of the host spacecraft, while the submitted result needs to be based on the chaser spacecraft coordinate system of the initial frame. How do we convert between these two?