基于北斗卫星的气象数据传输系统设计

Design of meteorological data transmission system based on Beidou satellite

作为北斗卫星导航系统的重要组成部分,气象数据通信采用报文作为其传输方式。而传统的报文传输方式存在覆盖地区受限、发布时间延后等问题,因此报文的长度和传输容量也会受到一定限制。文中通过对气象卫星的数据通信过程进行分析,优化通信流程,建立了双指挥机气象数据传输系统。该系统中,副指挥机对主指挥机接收的数据进行监听,提高了数据的准确性,确保气象数据不会丢帧。在优化报文传输次数的基础上同时设定了报文格式,使用双报文系统进行通信,进而保证系统的通信准确率。在测试服务器中随机生成约十万条报文信息进行实验,实验结果表明,测试数据传输成功率为95.8%,且测试样本传输时延置信度均在95%~100%置信区间内,可以满足数据通信的要求。

As an important part of Beidou satellite navigation system,meteorological data communication adopts message as its transmission mode.However,the traditional message transmission mode has some problems such as limited coverage area and delayed release time,so the length and transmission capacity of the message will also be limited.In this paper,through the analysis of the data communication process of meteorological satellite,the communication process is optimized,and the meteorological data transmission system of dual command aircraft is established.In this system,the secondary command plane monitors the data received by the main command plane to improve the accuracy of the data and ensure that the meteorological data will not lose frames.On the basis of optimizing the number of message transmission,the message format is set and the double message system is used for communication to ensure the communication accuracy of the system.About 100000 messages are randomly generated in the test server for experiment.The results of experiment show that the success rate of test data transmission is 95.8%,and the confidence of transmission delay of test samples is within 95%~100%confidence interval,which can meet the requirements of data communication.