Abstract
In order to realize the near real-time prediction of the ocean acoustic field, this paper conducted a comparative study of HYCOM data and NMDC data for the application of hydrographic datasets, and drew pseudo-color maps of ocean surface temperature distribution and sound velocity distribution characteristics in the area of 4°N~26°N and 105°E~1236°E respectively. Moreover, the 3D visual distribution of sound velocity in the ocean acoustic field in a 1° grid region of 114°E~115°E, 18°N~19°N is also conducted. Comparisons of the results with the two datasets shown that the acoustic velocity distribution characteristics generated by these two datasets remain consistent overall, and the data generated by HYCOM has more detailed features than the NMDC, however, NMDC data has smaller size and advantageous data type of acoustic velocity, which reduces the requirements for computer hardware and offers a faster processing speed.
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