RSKderiveSA.m

The function derives absolute salinity using the TEOS-10 GSW toolbox (http://www.teos-10.org/software.htm). The result is added to the RSK data structure, and the channel list is updated. The workflow of the function depends on if GPS information is available:

1. When latitude and longitude data are available (either from optional input or station data in RSK.data.latitude/longitude), the function will call SA = gsw_SA_from_SP(salinity,seapressure,lon,lat)
2. When latitude and longitude data are absent, the function will call SA = gsw_SR_from_SP(salinity) assuming that reference salinity equals absolute salinity approximately.

Note

When geographic information are both available from optional inputs and RSK.data structure, the optional inputs will override. The inputs latitude/longitude must be either a single value of vector of the same length of RSK.data.