Effects of temperature variations in high-sensitivity Sagnac gyroscope

Abstract GINGERINO is one of the most sensitive Sagnac laser-gyroscopes based on an heterolithic mechanical structure. It a prototype for GINGER, laser gyroscopes array proposed to reconstruct Earth rotation vector and in this way measure General Relativity effects. Many factors affect final sensitivity gyroscopes, particular, when they are used long-term measurements, slow varying environmental parameters come into play. To understand role different terms allows design more effective as well optical layouts, while proper model dynamics affecting (low frequency) signals would increase effectiveness data analysis improving overall sensitivity. In contribution, we focus our concerns effects room temperature pressure aiming at further stability apparatus. Our compatible with local orientation changes Gran Sasso site below $$\mu $$ μ rad predicted by geodetic models. This value consistent requirements GINGER installation high-sensitivity gyroscope oriented maximum signal, i.e. along axes.