中国空间科学技术

中国空间科学技术

• •    

风云二号卫星 CDAS 编码遥测机的设计

王晰   

  1. 北京空间飞行器总体设计部
  • 发布日期:1998-06-25

TELEMETRY DECODING SYSTEM DESIGN OF FY2 CDAS

Wang Xi(Beijing Institute of Spacecraft System Engineering,Beijing 100086)   

  • Online:1998-06-25

摘要： ＦＹ－２气象卫星指令与数据获取站（ＣＤＡＳ）中的编码遥测机作为卫星监测系统，解调卫星的编码遥测信号，实时获取星上编码遥测数据，以便分析和掌握整个卫星的工作情况，对卫星进行正确的管理和使用。解调后的数据也送到运行控制中心（ＳＯＣＣ）。采用双机热备份提高系统的可靠性。给出设计可靠的编码遥测地面系统的方法，包括副载波解调、ＩＲＩＧ－Ｂ型时统码解调、帧同步锁定，用计算机实时分析遥测数据等。

关键词: 遥测数据, 解调技术, 帧同步, 实时处理

Abstract: The telemetry decoding system of FY2 CDAS is used to demodulate coded telemetry signal to get information from Chinese FY2 meteorological satellite.The operators then analyze all these decoded data in order to know the working status of the satellite in detail.These decoded data are also transmitted to the SOCC.A redundant design,including active part and backup,enhances the reliability of the system.In case of the active equipment is out of order,the running of backup can be automatically switched.In this paper,the designing methods for a reliable telemetry decoding system are given,including subcarrier demodulation,frame synchronization,IRIGB time decoding,real time data analysis on computer etc.