Dataset: Inferring Inherent Optical Properties of Sea Ice Using 360-Degree Camera Radiance Measurements

New types of compact 360-degree cameras have recently appeared on the consumer technology market. Some of these allow users to access raw imagery, offering sensor-level data that can be directly exploited for absolute light quantification. This paves the way for easy-to-use, inexpensive and accessible radiance cameras that can be operated in a wide range of natural environments. 

This dataset presents the angular radiance distributions measured with the Insta360 ONE 360-degree camera in sea ice. We report vertical profiles of the light field structure at two sites reprensentative of distinct sea ice types: High Arctic multi-year ice and Chaleur Bay (Quebec, Canada) landfast first-year ice. 

This repository contains the radiometric data stored in Hierarchical Data Format (HDF5, h5) under the following names: 

oden-08312018-imf-fluo.h5

baiedeschaleurs-03232022-imf-fluo.h5

The High Arctic dataset (oden-08312018-imf-fluo.h5) contains only one station, while the Chaleur Bay (baiedeschaleurs-03232022-imf-fluo.h5) has four that can be accessed using these tags: "station_1", "station_2", "station_3", "station_4". The radiance measurements at each depth are reported as 2-dimensionals arrays with the azimuth directions (0-359°, 1° resolution) as columns and the zenith directions (0-180°, 1° resolution) as lines. The routines (coded in python) for the data processing can be found in the following Github repository (master_v01) or the Zenodo stored version.  

The methodologies to carefully calibrated the 360-degree camera for radiometry purpose are described in this pulibcation and the raw calibration data can be found in this Zenodo repository. 

Additionnal information on the fieldwork and the data analysis are described in the preprint.