Ocean Optics measurements are in units of irradiance reflectance and were corrected for irradiance changes. All spectra of one measurement have the same timestamp. For ROIs 07B, 07C and 15A, positions of each measurement can be localized by joining the GPS data with the spectral data on the datetime of the measurement. For ROI 09A, GPS positions have been acquired after the spectral measurements. For this data set, only the entire data set can be localized by a set of GPS positions.