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1卫星导航概况导航的概念及发展从古至今,人类一直在孜孜追求导航的技术。从早期的司南定向,到航海时代的星盘、六分仪、航海钟,再到现代无线电导航,直至近几十年,随着科学技术的进步,尤其是航天技术的发展,人们进入到卫星导航的时代,才获得相对理想的定位、导航与授时信息。卫星导航系统能够提供定位、导航与授时信息。定位,是指以标准大地坐标系为参照,按照用户规定的实时性要求,提供精确的二维或三维位置和方位的能力;导航,是指按照用户实时性要求确定当前
1 Overview of satellite navigation The concept and development of navigation Since ancient times, mankind has been diligently pursuing navigation technology. From the early orientation of Sinan to the astrolabe, sextant, navigation clock and modern radio navigation in the nautical age, until recent decades, with the progress of science and technology, especially the development of space technology, people entered the satellite Navigation era, it was relatively ideal positioning, navigation and timing information. Satellite navigation system can provide positioning, navigation and timing information. Positioning refers to the standard earth coordinate system as a reference, in accordance with the requirements of real-time user requirements, to provide accurate two-dimensional or three-dimensional position and orientation capabilities; navigation, refers to the real-time requirements of the user to determine the current