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首页> 外文会议>Proceedings of the 17th international technical meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2004) >Real-Time Point-Positioning Performance Evaluation of Single-Frequency Receivers Using NASA’s Global Differential GPS System
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Real-Time Point-Positioning Performance Evaluation of Single-Frequency Receivers Using NASA’s Global Differential GPS System

机译：使用NASA的全球差分GPS系统对单频接收器进行实时点定位性能评估

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摘要

This paper evaluates the real-time positioning performance of a single-frequency receiver using the 1- Hz differential corrections as provided by NASA’s Global Differential GPS (GDGPS) System. While a dualfrequency user has the ability to eliminate the ionosphere error by taking a linear combination of observables, a single-frequency user must remove or calibrate this error by other means. To remove the ionosphere error we take advantage of the fact that the group delay in the range observable and the carrier phase advance have the same magnitude but are opposite in sign. A second way to remove this error is to calibrate the ionosphere with a real-time database of grid points computed by JPL’s RTI (Real-Time Ionosphere) software. In both cases we evaluate the positional accuracy of a kinematic carrier phase based point-positioning method on a global extent.
机译：本文使用NASA的全球差分GPS（GDGPS）系统提供的1 Hz差分校正来评估单频接收机的实时定位性能。尽管双频用户可以通过对观测值进行线性组合来消除电离层误差，但单频用户必须通过其他方式消除或校准该误差。为了消除电离层误差，我们利用了一个事实，即在可观察范围内的群时延和载波相位超前具有相同的幅度，但符号相反。消除此错误的第二种方法是使用由JPL的RTI（实时电离层）软件计算出的网格点实时数据库来校准电离层。在这两种情况下，我们都在整体上评估了基于运动载波相位的点定位方法的位置精度。

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