Patent ID: 9052380
Filing Date: 2015-06-09
Classification: G01S,G01V

Abstract:
1. A method for determining a position of at least one seismic sensor when deployed underwater, the method comprising: sending a first mono-frequency signal from a moving source; recording the first signal with the at least one seismic sensor; evaluating a frequency drift of the recorded first signal; determining a position of the at least one seismic sensor based on the evaluated frequency drift and a source movement relative to the at least one seismic sensor; repetitively sending the first signal from the source; recording locations of the source and associated times when repetitively emitting the first signal; determining a modeled frequency drift curve based on the first signal and its corresponding times, radial velocities of the source, and medium parameters; and determining a measured frequency drift curve from the recorded pressures, particle velocities or particle accelerations and their corresponding times.