When a logger is configured to store data in Desktop format, RSKtools reads only the measured channels (e.g., conductivity, temperature, pressure), and it does not read derived channels (e.g., salinity, depth), even though Ruskin displays both. 

RSKtools provides functions to compute derived quantities from measured channels. All derivation functions have the syntax:

rsk = RSKderivevariable(rsk,[OPTIONS])

These functions add the derived variable as a column in the data.values field, and update channels fields: longNameshortName, and units.