导航电文设计与评估技术研究综述
Review on GNSS Navigation Message Design and Evaluation

卫星导航电文是卫星导航系统正常运行与性能保障的必备因素，对电文的设 计与评估是卫星导航系统设计与建设的关键环节。本文从卫星导航电文的数据内容、电 文结构、播发方式等几个方面，对目前不同的全球卫星导航系统的导航电文的发展 历程、性能差异等进行了分析探讨，指出了当前导航电文设计与评估存在的技术问题，并对 未来的相关技术和发展趋势进行了预测与展望。
Satellite navigation message is an indispensable element for satellite navigation system functioning normally and precisely. The design a nd evaluation of the message is critical for constructing a satel lite navigation system. The development history and performance discrepancy regarding extant differen t GNSS are analyzed in message content, message structure， and message broadcas t way. In addition, the technical problems of design and evaluation in current navig ation message are proposed. Furthermore, the relevant technologies a nd trends are predicted and prospected.