摘要
从GPS时间传递的基本公式出发,将影响传递精度的因素归纳为3部分:GPS系统本身的监控质量、信号传播路径的延迟和用户系统。系统的监控质量包括GPS系统钟的控制、卫星钟和卫星星历的误差等。信号传播过程中引起的时间延迟对时间传递结果的影响最直接,需进行修正,包括电离层修正、对流层修正和地球自转引起传播路径变化的修正等。用户系统的误差主要指接收机本身引入的测量误差。本文将讨论这3部分误差源,分析、计算这些因素对时间传递精度的影响,从用户的需要探讨提高传递精度的的途径。
Based on the basic equation used for calculating the time transfer via GPS, the error factors affecting the transfer accuracy are summarized into following three parts: the control unit's capability to monitor GPS clocks and satellite clocks and predict satellite's ephemeris, the influences of the time delay error caused by the mediums in the signal propagation path, which include ionospheric delay correction, tropospheric correction and correction for the rotation of the Earth (Sagnac effect), and the user's errors, which refer to those caused by the receiver itself and by the environment conditions. These effects on the time transfer accuracy are analyzed and calculated in this paper in order to find out a way to improve it.
出处
《陕西天文台台刊》
CSCD
1992年第1期68-73,共6页
Publications of The Shaanxi Astronomical Observatiory
基金
国家自然科学基金
