详细介绍了导航电文的特点以及其构成。
We also introduce the characteristic of the navigation telegram and its construction.
导航电文提取中最重要的步骤是位同步和帧同步。
The most important steps for navigation data extraction are bit synchronization and frame synchronization.
GPS测量机制的特点为单向电磁信号传播及透明的导航电文。
The specific points of GPS measurement mechanism are one way electromagnetic signal propagation and transparent navigation message.
GPS用户利用导航电文中的历书数据进行卫星可见性的计算和预报。
The almanac data in GPS navigation message is used by the user of GPS to calculate and forecast the visibility of navigation satellites.
北斗系统时间基准（北斗时），溯源于协调世界时，时差信息在导航电文中发播；
The BDT is related to the Coordinated Universal Time, and the time bias information is broadcast in the navigation message.
系统主要包含目标运动轨迹计算、误差计算、导航电文生成及信号调制发射等功能模块。
The system comprises the target trajectory calculation module, the error calculation module, the satellite navigation parameters generation module, and the signal modulation module, etc.
根据辅助型接收机能从 辅助网络获取导航电文的特点，提出了一种精简星历和卫星时钟参数辅助算法。
According to the feature that the AGPS(Assisted GPS) receiver can obtain navigation data from assisted network, a new algorithm for assisted Doppler is proposed.
根据辅助型接收机能从 辅助网络获取导航电文的特点，提出了一种精简星历和卫星时钟参数辅助算法。
According to the feature that the AGPS(Assisted GPS) receiver can obtain navigation data from assisted network, a new algorithm for assisted Doppler is proposed.
应用推荐