System for doppler positioning of seismic sensors and method

摘要

Method and system for determining positions of underwater sensors. The method includes sending a Doppler variant signal from a moving source; recording the signal with the at least one seismic sensor; evaluating a frequency drift of the recorded signal; and 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 sensor.

主权项

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.