Inverse method and precision improvement for seafloor positioning
For the precise GPS/Acoustic seafloor positioning, we are developing an analysis software, which combines a kinematic GPS result and an observed acoustic travel time to get a precise position of an array of seafloor stations. We summarize the method of this analysis, especially focusing on estimation of underwater sound velocity structure. In this analysis, vertical coordinates of seafloor stations and the sound velocity are not completely independent. Therefore vertical coordinates are greatly influenced by the error of sound velocity and in consequence their precision is more deteriorated than that of horizontal coordinates. So we present a new analysis strategy for precision improvement. In this strategy the vertical coordinates are no longer estimated values, but are fixed at known values. This strategy improves the estimation of sound velocity. As a result, the precision of estimated coordinates of seafloor stations got improved for the horizontal components.
| Main Authors: | , |
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
2005
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| Online Access: | http://hdl.handle.net/1834/15718 |
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