Estimation of typical frequencies of elastic oscillations of the International Space Station body

We describe the results of the investigation of free oscillations of the International Space Station (ISS) body. These oscillations appeared during docking or undocking of the spacecrafts and as a result of firing of thrusters of the Service Module (SM) attitude control system. The investigation was realized basing on the measurements of the low-frequency accelerometer MAMS. We picked out 14 segment of data for the investigation. All these segments were obtained in 2005 and 2006. Then we analyzed on those data segments only subsegments that corresponded to the process of free elastic oscillations of the station body. The typical frequencies of such oscillations and corresponding damping constants were estimated. The comparative analysis of the results received for the different docking units and for the different SM thrusters sets was carried out.