Oppelt, Natascha; Linhardt, Felix (2023): Water colour spectro-radiometry platform raw data (cau_boeoetle_1) from pack ice during legs 4 and 5 of the MOSAiC expedition with POLARSTERN to the Arctic Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.955777

This raw dataset contains in-situ hyperspectral and co-located water depth measurments from melt ponds on Legs 4 & 5 of the MOSAiC Expedition, collected by Böötle. The dataset allows to calculate remote sensing reflectance (R_rs) over melt ponds with associated melt pond water depth measurements.The small Böötle remote controlled water colour spectro-radiometry platform allows for the simultaneous collection of hyperspectral, bathymetric and temperature data in waters as shallow as 15cm. It is equipped with three OceanOptics STS-VIS spectro-radiometers (downwelling above-water and below-water irradiance, upwelling below-water radiance), a Tritech PA500 point sonar (water depth), and a DS18B20 temperature probe (subsurface water temperature). Propulsion is achieved by two air screws, thereby limiting the impact on the water column and the bottom substrate. The platform is remotely controlled by the operator with a maximum range of 100m. A web interface is provided via a wireless network, which allows for configuration and control of the sensor array. With a GPS receiver and two camera based systems, three independent localization systems are available. Data of each deployment is collected into a zip/tar file, holding a folder of plain text raw data (spectra, depth, GPS position) and image-based raw data (on-board all-sky camera; on-board and on-shore action cams (AC folders)). Digital copies of field notes (if any) are also included.

The Development of a hyperspectral measurement platform was supported by Prof. Dr. Werner Petersen-Stiftung (funding number 610).