动态后处理技术在长江口水深测量的适用性

长江口水域一直采用传统有验潮和GPS-RTK相结合的水深测量方法,但现有潮位站无法控制整个区域,RTK差分信号受距离限制又无法做到全覆盖,制约了水深测量效率与精度。GPS-PPK技术具有作业范围广、测量速度快、定位精度高等优点,不受无线电传输距离和通信网络环境的限制。通过在不同作业距离下的精度测试,GPS-PPK技术较传统有验潮和GPS-RTK结合的测量方法具有更高的作业效率和整体精度,可应用于长江口地区水深测量。

Adaptability of GPS-PPK in the water-depth measurement of the Yangtze River Estuary

In the Yangtze River Estuary water area,the combination of the traditional tide and GPS-RTK water depth measurement method is used widely.But the existing tide level stations are unable to control the whole area,and RTK differential signal which cannot cover completely is restricted by distance.The precision of water depth measurement is low.The GPS-PPK technique has much superiority such as wider operating range,faster measurement speed,and higher positioning precision.It is not limited by radio transmission distance and communication network environment.Based on the accuracy test of different operating distance,the GPS-PPK technique has higher operational efficiency and accuracy than the combination of the traditional tide and GPS-RTK method.The new technique can be applied to the water depth measurement in the Yangtze River Estuary.