A team of researchers from Grenoble’s laboratory ISTerre (Institute of Earth Sciences) study the motions of the Argentière glacier in the Mont-Blanc area. The weather conditions at 2700 meters altitude and the melting of the ice in summer are highly wearing on the equipment. They regularly carry out maintenance missions on the glacier area to ensure a continuity of data production from the GPS stations. Gradually, the damaged gear has to be replaced: batteries, solar panels, GPS antenna, masts... During the missions, the team also has to engage in physical effort for several hours, in a cold and isolated environment. To work at high-altitude and in risky environments, the researchers are trained by the National School of Ski and Alpinism (ENSA) in Chamonix.