The SIOS workshop on Copernicus data for Ice and Snow took place over the course of three days (11-13 September 2017) at the University Centre in Svalbard in Longyearbyen. SIOS’s remote sensing service, led by Dr Anna Maria Trofaier, was in charge of tailoring a training session that was aimed at providing researchers with the basic skills they need to discover and process Copernicus satellite data, using only open source software environments. The focus was on multispectral satellite data from the Copernicus satellites Sentinel-2 and -3.