# Reference Absorption (OPTAREF)

Reference Absorption is the amount of light measured by the reference detector. By dividing the Signal Absorption by the Reference Absorption the proportion of light absorbed as the light travelled to the receiver detector can be calculated. These values are part of the calculation for Optical Absorption Coefficient.

### Instrument Classes

The following instrument classes include this data product:

Typical Units
unitless

Sampling Regime
Water Column

Data Product Specification
Not Available