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.
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。
Basing on current single point positioning precision, certain coordinate error is added into fixed points to study the result.
根据目前单点定位精度给起始点加上适当的坐标偏差，研究起始点坐标偏差对基线处理结果的影响。
Problems concerned with the optimum design, precision estimation and control point positioning of the control network in construction survey of a power plant are introduced.
文中介绍某电厂施工测量中有关控制网的优化设计、精度估计及控制点位放样方法等问题。
We apply the least squares estimate to calculate GPS single point positioning equation and precision estimate, and put forward the new satellites' constellation choice algorithm.
将最小二乘法应用于解算GPS定位方程，并对其进行精度估计，提出了一种新的星座选择算法。
We apply the least squares estimate to calculate GPS single point positioning equation and precision estimate, and put forward the new satellites' constellation choice algorithm.
将最小二乘法应用于解算GPS定位方程，并对其进行精度估计，提出了一种新的星座选择算法。
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