Changing the frame of reference

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SUMMARY

The discussion centers on the challenge of transforming the geomagnetic field data from Earth's frame of reference to the cubesat's body frame for the design of magnetorquers. The user has data in Cartesian coordinates but faces issues due to the non-alignment of the frames and the rotation of the body frame in orbit. Key considerations include understanding the relative velocity between the two frames and the specific transformations required to calculate torque accurately.

PREREQUISITES
  • Understanding of Cartesian coordinate systems
  • Knowledge of frame of reference transformations
  • Familiarity with magnetorquers and their operational principles
  • Basic concepts of orbital mechanics
NEXT STEPS
  • Research coordinate transformation techniques in physics
  • Explore the mathematical principles behind torque calculations in rotating frames
  • Study the implementation of magnetorquers in satellite systems
  • Investigate simulation tools for orbital dynamics and magnetic field interactions
USEFUL FOR

Students in aerospace engineering, satellite design engineers, and researchers working on cubesat technology and magnetorquer applications.

hamdal
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I'm currently doing a student project at uni and I'm trying to design magnetorquers for cubesats.Before I make the prototype I need a simulation of what will happen.The problem is that for my calculations,I need to change the frame of reference of the geomagnetic field.So basically I need to go from Earth's frame of reference to the cubesat's frame of reference.I've been researching a lot and I haven't found much.Any suggestions that you might think will help?
 
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It's not clear what you're trying to achieve, eg whether this is about a velocity boost, a rotation, a change of coordinate type (eg spherical vs Cartesian), or some combination of the above.

What sort of coordinates are you using in the two frames?

Do the two origins have a nonzero relative velocity?

Are the axes of the two frames aligned?
 
andrewkirk said:
It's not clear what you're trying to achieve, eg whether this is about a velocity boost, a rotation, a change of coordinate type (eg spherical vs Cartesian), or some combination of the above.

What sort of coordinates are you using in the two frames?

Do the two origins have a nonzero relative velocity?

Are the axes of the two frames aligned?

Well I have the data for the geomagnetic field but it is in Earth's frame if reference.My magnetorquers are in body frame of reference so if I want to calculate the torque, I need to work in the same frame. Both of them are normal Cartesian coordinates. The are not aligned and the body frame is rotating in a given orbit. Sorry if the details are vague, but I'm so confused myself that I don't know what I should look for.
 

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