clean GRIS header
After discussing with Manolo and Carlos while working on the slit orientation issue I found out that some of the values we are propagating in the GRIS header are not correct, they might:
- be historic values such as
SLITORIEwhich do not have a well-defined or obvious function
- be values that apply only to observations but not single slit positions (e.g.
- be unreliable due to different ephemerides code used for producing them/not be compliant with the telescope's definitions (again
For fully consistent headers, we would need to go through each value, assess the definition and validity, document that and throw out all confusing values.