{"thcode":2,"term":{"code":2080,"name":"sound velocity","parent":1304,"scope":"Estimates of the velocity of sound in water, indexed by depth at a specific location, usually calculated from other water properties."},"uf":[{"name":"sound velocity profiles","usewith":{"code":2081,"name":"profiles","parent":235,"scope":"Observations or calculations given for a series of depths, at or near the same horizontal position."}}],"bt":[{"code":1304,"name":"water properties","parent":1174,"scope":"Measurable physical and chemical characteristics of water from different sources."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":2037,"name":"interferometric sonar","parent":1083,"scope":"Acoustic technique for determining depths or creating backscatter imagery in a wide swath of seafloor or lakebed centered below the instrument platform."}]}