Abstract
This photo was taken as part of a remeasurement in 2018 of the PPY0 site, installed in 1995 as part of the ResPyr network and modified to be measured with Tech2000 masts, as part of the National observation service (SNO) Résif-Rénag. The aim of the ResPyr campaign is to quantify the current deformation velocities in the Pyrenees. The Netr9 receiver and the Trimble Geodetic Zephyr antenna are visible in the photo. They belong to the National Mobile GNSS Park (GPSMob). GPSMob and the Rénag are part of Résif, a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the internal Earth. Résif is based on high-tech observation networks, composed of seismological, geodesic and gravimetric instruments deployed densely over the whole of France. The data collected allows the study of ground deformation, surface and deep structures, local and global seismicity and natural hazards, particularly seismic hazards, on the French territory with a high spatial and temporal resolution. Résif is part of the European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior in its entirety and for studying numerous natural phenomena.