Combining OTP with 3rd-Order Gradient Compensation

Dear MNE users,

I am working with CTF MEG data and exploring the potential application of OTP. While I haven’t tested OTP on my dataset yet, I believe it should be theoretically possible to apply it. I have a few questions regarding its combination with other noise-reduction techniques, specifically CTF’s 3rd-order gradient compensation:

  1. Is it possible to combine OTP with CTF’s 3rd-order gradient compensation, similar to how tSSS is integrated with OTP in other contexts?

  2. If OTP is applied, could it potentially replace the need for 3rd-order gradient compensation, or are there scenarios where both methods might complement each other?

Many thanks for any help you might give me!

Best,
Erfan