Differential Method of Positioning a Standalone Unmanned Submersible in Seismic Exploration
Abstract
Introduction: One of the most important problems in seismic exploration with a standalone unmanned submersible is to determine its location with the required accuracy. Such seismic surveys have certain peculiarities: small size of the submersibles, their impossibility to emit an acoustic signal, and the difficulty to determine their own location with high accuracy. Therefore, the available methods for positioning an object in a marine environment cannot be fully applied. Purpose: We need to develop a method for positioning a standalone unmanned submersible taking into account all its specific features, including the differential mode of correcting the device position. Method: The distance between the device and the radiator is measured by the difference-ranging method which allows you to eliminate the errors caused by the discrepancy between the time scales of the device and of the radiator. Results: A method has been developed for determining the location of a standalone unmanned submersible. Unlike the previously used methods, this one does not require the synchronization of the radiator and receiver scales, special research of the sound propagation medium, or providing emission from the device. All the calculations can be carried out aboard the submersible. Setting up just one base station in the area makes it unnecessary to arrange a network of “beacon-responder” bottom stations which are commonly used now with the long base technique. The differential mode of the proposed method includes algorithms for generating differential corrections in order to correct the submersible position which are widely used in satellite navigation. The conducted research helped us to find the ways of using the differential correction mode and to determine the limitations of the proposed method. Practical relevance: The proposed method significantly reduces the time necessary for the preparatory work in seismic exploration, being more commercially concealed as compared to others.Published
2017-08-21
How to Cite
Martynova, L. (2017). Differential Method of Positioning a Standalone Unmanned Submersible in Seismic Exploration. Information and Control Systems, (4), 77-85. https://doi.org/10.15217/issn1684-8853.2017.4.77
Issue
Section
Information channels and medium