Quick question regarding the coordsystem.json. I can’t find the source anymore, but I believe that I have read somewhere that there can only be one
_coordsystem.json for test session, which is also what I see in my
meg directories. However, in my study that includes multiple tasks within a single test session, I had a subject a while ago that managed to remove one HPI coil from his head during a short break between tasks. Therefore, I had to digitize the HPI locations again.
In such a scenario, I would need two
coordsystems.jsons that code the respective HPI coordinates, but since only one is allowed, one would be overwritten, right?
I guess the only way to bypass this problem would be then to additionally set the
acq field for each task separately. Or am I missing anything? Would I then need to specify the
acq field in all recordings of all subjects for consistency within the dataset sakes, or is it fine to have only a few subjects/sessions for which the
acq field was set?