Absorbance standard deviation of electromagnetic radiation (unspecified single wavelength) {light absorbance} by the water body by transmissometer and calibration to read zero in clear water absorb_cwoffset_2D_SD The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement. 2019-06-04 17:32:45.0 SDN:P01::ABSDXAC9 SDN:P01::ABSDXAC9 SDN:P01::ABSDXAC9 2 2 2019-06-04 17:32:45.0 accepted false