Patent ID: 8625387
Filing Date: 2014-01-07
Classification: G01S,G01V

Abstract:
1. A method for selecting a signal arrival for determining an accurate position of seismic equipment, comprising: predicting a direct arrival and a reflected arrival of a signal transmitted from a pinger to a receiver, wherein each arrival is the time between the transmission of the signal to reception of the signal; defining a confidence time interval for reception of the direct signal arrival based on the predicted direct signal arrival; transmitting the signal from the pinger; measuring the direct and the reflected arrivals of the signal at the receiver; selecting the measured signal arrival that is similar to the predicted direct arrival as a preliminary signal arrival; and finalizing a signal arrival for determining the position of seismic equipment, wherein the selected preliminary signal arrival is the finalized signal arrival if the selected preliminary signal arrival was measured within the confidence time interval, and wherein the finalizing the selected arrival comprises adjusting the selected preliminary signal arrival to substantially match the predicted direct signal arrival when the selected preliminary signal arrival was measured outside of the confidence time interval.