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扩频模式星锁指示是判断上行信号锁定与否的重要参数,它是关系到双捕能否完成的关键。针对地面测控设备跟踪某遥感卫星时星锁异常的问题,采用FTA(故障树分析法)从星地两方面查找原因,找出了造成星锁异常的主要因素是扩频应答机下行测量帧中CRC(交叉冗余码校验)计算错误,诱因归结为扩频应答机FPGA(现场可编程门阵列)存储器中程序码受SEE(单粒子效应)干扰所致。提出一种针对性处置策略,为后续星的工程应用提供切实可行的途径。
Spread spectrum mode Star lock indicator is to determine the uplink signal lock or not, an important parameter, it is related to the double capture can complete the key. Aiming at the problem of star-lock abnormality when a ground-based monitoring and control equipment tracks a remote sensing satellite, FTA (Fault Tree Analysis) is used to find out the reasons from both the star ground and the main factors that cause the star lock anomaly. CRC (cross-redundancy check) calculation error, the incentive attributed to the spread spectrum transponder FPGA (Field Programmable Gate Array) memory program code by the SEE (single-particle effect) interference. Proposed a targeted disposal strategy for the follow-up satellite engineering to provide practical ways.