Marine streamer inertial navigating drag body

摘要

A sensor streamer drag body system. At least some of the example embodiments include a system having a sensor streamer towable behind a vessel in a body of water, the sensor streamer defining a defining a distal end and a proximal end, the proximal end nearest the vessel. The system further includes a drag body coupled to the distal end of the sensor streamer, wherein the drag body remains submerged while the sensor streamer is deployed. The drag body includes an inertial navigation system. The inertial navigation system is configured to determine a position of the drag body, the drag body lacking an internal GPS.

主权项

1. A drag body comprising:
an inertial measurement unit configured to generate: a determination of linear acceleration of the drag body, and a determination of angular acceleration of the drag body; a computer system comprising a processor and a memory device; and a connector configured to communicatively couple the drag body to a sensor streamer of a marine geophysical survey; wherein operational buoyancy of the drag body is constant, and wherein the processor:
determines a calculated position of the drag body relative to a starting position, the determination of position made without using a GPS position of the drag body; andcorrects the calculated position based on at least one of either:
data indicative of position of a survey vessel;data indicative of relative position of the drag body with respect to at least one other device; ordata indicative of a calculated position of another drag body.