Add tutorial with example profile

[gunnarvoet]

No description provided.

[hdrake]

I'm working on it. I don't know if the profiles I'm working with are particularly clean already, but it is hard to see the effect of each individual processing step.

So instead I'm taking the approach of purposefully corrupting the example profile and then making sure each processing step is doing the intended fix.

For example, here is the the before and after of the first processing step ctd_cleanup, which includes: 1) pressure despike, 2) T/S despite, 3) get rid of unphysical out-of-bound values, 4) get rid of some surface data.

@gunnarvoet, what do you think of a tutorial that steps through a corrupted example profile in this way? I think it would also be nice to re-use the exact same profile in https://github.com/modscripps/mixsea and any other related packages (what do you think @jessecusack?)

[gunnarvoet]

I like your idea of introducing clearly visible data issues, at least where this is possible. Another option would be to zoom in on regions where changes happen, for example, loop editing is hard to identify on a full profile but becomes more apparent when looking at a depth range of 10m or so.

[hdrake]

@gunnarvoet I think you're right that for the more subtle processing steps we will need to really zoom in on particular features. I think the best idea will be to pick out a profile that already has a lot of variance and ideally even some big overturns so that the quality of the profile can be tracked through all of the steps and then it can lead straight into an example in mixsea (where we could show how the processing affects mixing rate estimates, by comparing a raw binned profile to the fully processed one).

[gunnarvoet]

@hdrake that sounds great.

[jessecusack]

I think illustrating the processing of noisy data using ctdproc before passing that on to mixsea would be a really nice addition!