In order to investigate the accuracy of GNSS 3D waterway observation technology in the middle reaches of Yangtze River and the middle and lower reaches of Han River,we based on the current research status of bathymetry at home and abroad,described the basic principles of bathymetry measurement of the traditional tide gauge mode and the GNSS 3D waterway observation mode,obtained the dynamic altimetry data of the GNSS through the Hypack software,and made a detailed analysis of the accuracy of bathymetric data of the two modes in the test area.The results showed that the accuracy of segmental elevation conversion model and the GNSS positioning in the test area were relatively good.Com-pared with the tide gauge data,the percentage of measurement points with water level difference less than 0.1 m in GNSS 3D waterway observation data was larger than 95％,which met the requirements of relevant industry specifications.It proved that the GNSS 3D waterway observation technology had a certain reliability and accuracy in the middle reaches of Yangtze River and the middle and lower reaches of Han River and can be further popularized and applied.
关键词
GNSS三维水道观测/验潮水位/水深测量/长江中游/汉江中下游
Key words
GNSS 3D waterway observation/tide level/bathymetry/middle reaches of Yangtze River/middle and low-er reaches of Han River
维普
万方数据