中长距离水运工程高精度潮位获取技术.

In order to solve the problem of obtaining high-precision tidal level in the port & waterway engineering far from the coast, the principle of medium and long distance GNSS positioning considering ocean water vapor, and the method coupled tide level extraction algorithm were studied and related software were developed. The instantaneous three-dimensional coordinates of GNSS antenna were measured by using PPK technology based on GPS and BDS, the instantaneous elevation of the sea surface was obtained by combining its coordinates in the hull coordinate system, the tide level in navigation was finally obtained through the Fourier transforming, wavelet filtering, and the conversion of the vertical datum. It has been proved by many tests and practical application that the accuracy of PPK technology in locating and acquiring tidal level in the medium and long distance waters can meet the requirements of horizontal positioning and tidal level in port & waterway engineering. [ABSTRACT FROM AUTHOR]