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导航星全球定位系统(简称 GPS)是一项全新的卫星导航定位的高技术工程,是全球可共享的技术资源。它具有全球覆盖、全天候工作、全天24小时连续而实时地为无限多个用户提供高精度七维(三维位置、三维速度和时间)信息的能力。实时定位精度可达10m 以内,事后处理的定位精度可达1m 左右。测速精度可达0.1—0.01m/s。时间传递和时间同步精度可达10—1ns(10~(-9)s).本文简要介绍了 GPS 的概况和国内外开发研究的动态。着重就 GPS 时间传递的原理、力法和误差做了较深入的分析和论证。报道了国内首次 GPS 共视法时间同步大型试验的情况和取得的结果。最后,作者专门论述了 GPS 技术在航天领域的应用前景。
Navigation Star Global Positioning System (referred to as GPS) is a new satellite navigation and positioning of high-tech projects, is a global share of technical resources. It has global coverage, 24/7 workday, and continuous, real-time capability to deliver unlimited precision, seven-dimensional (3D position, 3D velocity and time) information to an unlimited number of users. Real-time positioning accuracy of up to 10m, post-processing positioning accuracy of up to 1m. Speed accuracy up to 0.1-0.01m / s. Time transfer and time synchronization accuracy of up to 10-1ns (10 ~ (-9) s). This article briefly introduced the GPS overview and developments in domestic and foreign research and development. Focus on the principle of GPS time transmission, power methods and errors made a more in-depth analysis and demonstration. Reported the first GPS common view of the time synchronization of large-scale trials and the results obtained. Finally, the author discusses the application of GPS technology in the field of aerospace.