Example 18: deri_o2sat_garcia Derived O2 saturation from concentration

Consider an RBRconcerto C.T.D.DO logger, where the DO channel is a RBRoptode. The RBRoptode transfers both the foil temperature and the dissolved oxygen concentration (not compensated for salinity). The RBRconcerto calculates the concentration compensated for salinity first, then the air saturation (in %) via the following equation:

Where Cc is the concentration in uMol/L, compensated for salinity.

Solubility is calculated via Gordon and Garcia as:

where S is the salinity in PSU and Ts is defined as:

with T being the water temperature in °C and:

Air vapor pressure (in dbar) is calculated via :

The n-coefficients in the logger equation correspond to the following:

• n0, the index of the concentration channel, already compensated for salinity.
• n1, the index of the water temperature channel.
• n2, the index of the salinity channel.
• n3, the index of the atmospheric pressure channel. This last one is generally set to value , to use the default value provided by the logger; see settings atmosphere.

Example commands:

( Confirm the channel type ) 

( Request confirmation of everything )