# A new accurate measurement of the dragging of inertial frames a century after the Einstein, Thirring and Lense papers.

Lucchesi D.M., Anselmo L., Bassan M., Magnafico C., Pardini C., Peron P., Pucacco G., Visco M.

Comunicazione
III - Astrofisica
Aula GSSI Rettorato - Auditorium - Venerdì 27 h 09:00 - 12:00
Gravitomagnetism represents one of the most peculiar predictions of Einstein's geometrodynamics and describes the spacetime curvature effects due to mass-currents. Following Einstein, gravitomagnetism is responsible of the so-called dragging of the local inertial frames, whose axes are defined by the orientation of gyroscopes with respect to the distant stars. The orbital plane of an Earth-orbiting satellite is a sort of enormous gyroscope once removed all classical perturbations that arise from the main gravitational and non-gravitational perturbations. We present a new measurement of the dragging effect by using a combination of the right ascensions of the ascending nodes of the orbits of the two LAGEOS satellites and that of LARES, which results in a measurement, both precise and accurate of the Earth's gravitomagnetic field, with an assessment towards $\approx 1$% of the main systematic sources of error. The LARASE Collaboration carries on this project within the Astroparticle Committee (CNS2) of INFN.