HyperPro II
SeaBird HyperPro II

The HyperPro II is an in situ, free-fall profiling system developed by Sea-Bird Scientific to measure ocean optical properties. It includes three hyperspectral radiometers and a profiling frame with sensors for conductivity, temperature, and pressure. One radiometer points upward to measure downwelling irradiance, another points downward to measure upwelling radiance, and the third is mounted on the ship to measure incoming solar irradiance. The radiometers operate from 350 to 900 nm with a spectral resolution of 10 nm. The HyperPro II is deployed from behind the research vessel and free-falls at approximately 30 cm/s.