In the framework of the FORUM project, HYGEOS team contributed to a study on the potential of hyperspectral thermal infrared spaceborne measurements to retrieve ice cloud physical properties. As part of these activities, HYGEOS participated to a publication on quantifying the potential of the Infrared Atmospheric Sounding Interferometer (IASI) and the future IASI next generation (IASI-NG) for retrieving the ice cloud layer altitude and thickness together with the ice water path.