Seafloor spectral reflectance factors and georeferenced water depths from Cambridge Bay, NU.

Spectral reflectance measurements were taken using the panel substitution method with a dual-channel Ocean Optics Jaz in an underwater housing, while SCUBA diving. A standard polytetrafluoroethylene (PTFE) panel was used as reference. The second channel was pointing up, to adjust for differences in illumination conditions between panel and seafloor measurements. Water depths were measured with a SonarMite single-beam echosounder, not adjusted for pitch and roll, nor for salinity and density. The transducer was placed approximately 20 centimetres below the water surface. Georeference was provided by a Trimble R1 Global Navigation Satellite System (GNSS) receiver using satellite based augmentation systems (SBAS) corrections. The two data streams were integrated using the Seafloor Systems SonarMite software.