create initial list of reference data models and calculated reflectivities

[bmaranville]

Probably just simple slab model to start, then one with a well-defined Gaussian roughness, then a magnetic slab system.

[andyfaff]

Is this kind of equivalent to the samples defined in the validation workflow? (which BA, refl1d, and refnx all validate successfully against)

Note, the validation examples don't include any PNR.

[acaruana2009]

What is required for this? Does it require real data, or would a sample simulation do? I.e. I am happy to sort out some simple refl1d PNR examples if not already done. Do they need to be in a specific format, or is a general refl1d script fine? Additionally do we want some PA examples (i.e. spin flip scattering/magnetic angle)?

[bmaranville]

I think we're looking for simulations and not real data here. These will be reference calculations rather than reference data. @andyfaff yes, this maps on to a lot of work that you've already done in the validation area, specifically to validate any future calculation implementations in addition to the implementations you've already tested.