卫星地面站系统软件抗衰策略研究

摘要

Satellites are increasingly widely used in military reconnaissance,resource exploration, weather forecasting,television broadcasting, communications and other important areas, so the satellite ground station system should have higher request than any ordinary sof vare system for security,reliability,survivability,error detection and recovery.Satellite systems require a high degree of real time so the satellite ground station software system is not allowed in force.However,there exists the software aging phenomenon in system which will lead to software failure.To resist software aging, this paper presents a software micro-strategy of anti-restart applications that can shorten the average recovery time(MTTR),achieving the target to improve the reliability of the system.Meantime,the microreboot strategy can track satellite altimetry and precise orbit determination of the original provision of satellite observation data.Satellite altimetry can improve the rail and the accuracy of orbit determination which has an important practical significance and the application value.%卫星被越来越广泛地应用到军事侦察、资源勘探、气象预报、电视转播、通讯等重要领域,所以卫星地面站系统比普通的软件系统对安全性、可靠性、抗毁性、错误检测和恢复等有更高的要求.卫星系统高度的实时性要求卫星地面站软件系统是不允许失效的.但是软件系统存在软件老化现象,导致软件失效,为了对抗软件老化,采用了一种针对卫星地面站软件系统抗衰的微重启策略,可缩短应用系统的平均恢复时间(MTTR),提高系统的可靠性,可以为卫星测轨和定轨提供精确的原始卫星观测数据,对改善卫星测轨和定轨的精度具有重要的现实意义和应用价值.