Oxygen unit

[akmazur]

the current oxygen unit is umol l-1 should we change it to mmol m-3 instead to have SI units?

[akmazur]

I changed the unit to mmol m-3

[callumrollo]

This Issue was resolved in PR #25

[akmazur]

Oxygen unit umol kg-1

[callumrollo]

Is that the unit output by the optode? If not, we'll need to do some post-processing

[callumrollo]

The yaml files need to represent the units of the data as they are supplied by the glider

[akmazur]

The unit from optide is umol l-1. I think we should keep mmol m-3 in the yaml. Bastien suggests that we should post-process the data to umol kg-1. Most Helcom documents show oxygen in mg l-1 or ml l-1. For easy comparison it would be nice to be consistent with them. However if I understand umol kg-1 is a standard. So I really don't know what's the best.