The 8th workshop on GNSS reflectometry (GNSS+R 2015) will take place at the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences in Potsdam on May 11–13, 2015. The GNSS reflectometry is a new emerging field in geodesy and for the first time the workshop will be held at a famous historical place in Germany. Until today, the GFZ is still one of the most important geodetic institutions worldwide. The reflectometry workshop will highlight results obtained in a field of microwave remote sensing in which existing signals, transmitted for other purposes, are re-utilized as sources of illumination. This includes some features of active radar scatterometry, passive radiometry, and altimetry.