介绍了精密单点定位的精度和研究现状，分析了其优越性，展望了在航道测量方面的应用可行性。
This paper introduces the precision and current research status of precise point positioning (PPP), analyses its advantage, and the feasibility of PPP used in Shipping Lane Survey was expected.
周跳探测是单频精密单点定位技术的难点之一。
Detecting cycle slips is one of the technical difficulties in single-frequency precise point positioning.
简要介绍了GPS双频精密单点定位数学模型及自主研制的精密单点定位软件。
The mathematic model of GPS dual-frequency precise point positioning and the corresponding program named "GPS-PPP" recently developed by the author were presented.
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