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New insights on the orbital debris collision hazard at GEO

机译:对GEO轨道碎片碰撞危险的新见解

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An analysis is performed of the orbital debris collision hazard to operational spacecraft at geosynchronous orbit (GEO). As part of the examination, the contribution of individual components of the population are considered and presented to provide a clearer linkage between object characteristic and resulting risk. Our examination of GEO collision risk reveals several critical new insights: (1) the current probability of collision in GEO is relatively low, yet the future is difficult to predict due to our limited ability to observe objects in GEO and the uncertainty in past and future debris-generating events in GEO; (2) the probability of collision in GEO is not uniform by longitude-it is seven times greater in regions centered about the geopotential wells; (3) the probability of a mission-terminating collision is greatly dependent upon the approximately 2200 objects in the 10 cm-1 m range observed in GEO but not yet cataloged; (4) hardware relocated to GEO "graveyard" disposal orbits pose a potential additional, but not fully understood, collision hazard to operational GEO satellites; and (5) the collision hazard throughout the course of a day or year is highly episodic (i.e. non-uniform).
机译:对地球同步轨道(GEO)上运行中的航天器的轨道碎片碰撞危险进行了分析。作为检查的一部分,将考虑并提出总体中各个组成部分的贡献,以在对象特征和所产生的风险之间提供更清晰的联系。我们对GEO碰撞风险的检查揭示了一些关键的新见解:(1)当前在GEO中发生碰撞的可能性相对较低,但是由于我们观察GEO物体的能力有限以及过去和未来的不确定性,未来很难预测GEO中的碎屑事件; (2)经度在地球静止轨道上发生碰撞的机率不一致-在以地势井为中心的区域中发生碰撞的机率要大七倍; (3)任务终止碰撞的可能性很大程度上取决于在GEO中观察到的10cm-1 m范围内的大约2200个物体,但尚未进行分类; (4)搬迁至GEO“墓地”处置轨道的硬件对正在运行的GEO卫星构成了潜在的但尚未完全理解的碰撞危险; (5)在一天或一年的整个过程中发生的碰撞危险是偶发性的(即不均匀的)。

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