A system includes distributed sensors and a receiver that receives signals from the distributed sensors and that produces one or more interferometry signals from the received signals. The system also includes a digitizer to digitize each of the one or more interferometry signals. The system also includes at least one processing unit that processes each digitized interferometry signal to obtain unwrapped phase information and related parameter values. The unwrapped phase information is obtained based on a comparison of a current phase measurement with a reference phase predicted using a dynamic phase change model.