The imagery available for download consist of airborne hyperspectral imagery acquired for the Mer Bleue Arctic Surrogate Simulation Site (MBASSS) S2/L8 Data Product Validation Project in 2016. MBASSS was a collaborative effort aimed at developing a systematic approach for ongoing assessment and validation of satellite based land information products from Landsat 8 OLI and Sentinel 2 satellites. The primary airborne systems used for this project were the CASI-1500 and SASI-644 hyperspectral instruments (ITRES Research, Calgary AB) installed on the NRC Twin Otter. The Twin Otter provides a ‘low and slow’ platform well suited for airborne hyperspectral image collection.