Deep Space Navigation Augmentation Using Variable Celestial X-Ray Sources
Deep Space Navigation Augmentation Using Variable Celestial X-Ray Sources
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发表时间：
2009-01
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通讯作者：
S. Sheikh;J. Hanson;J. Collins;P. Graven
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作者：
S. Sheikh;J. Hanson;J. Collins;P. Graven
深空探测航天器导航解的准确确定是深空探测使命运行的关键。这些解决办法对于确保成功抵达预定目的地、保持地球跟踪站与远程飞行器之间的连续通信以及对于某些飞行任务在飞行器寿命期内监测其位置都是必要的。美国航天局深空网络（DSN）为地月系统以外的许多任务提供了这种能力。随着更多的任务计划和DSN的可用性变得有限，其他方法来保持准确的导航解决方案，这将减少对连续车辆跟踪和监控的依赖，变得有吸引力。通过提供可作为使命控制中心轨道确定算法的一部分加以处理的补充外部测量，利用可变天体X射线源开发航天器导航有可能提供这种额外的能力。这种新技术还具有通过车载计算提供自主导航能力的潜力。这些解决方案可以直接用于制导和控制。概述了DSN系统和X射线导航技术。介绍了一种组合导航系统的发展，该系统包括一个扩展卡尔曼滤波器，它结合了航天器动力学和两种类型系统的测量。一个模拟，已经产生了调查的潜力DSN的位置测量，增强与X射线源范围测量。提供了每个单独系统和组合系统的性能能力。
The accurate determination of navigation solutions for deep space exploration spacecraft is a crucial element of mission operation. These solutions are necessary to ensure successful arrival at the intended destination, to maintain continuous communication between Earth tracking stations and the remote vehicle, and for certain missions to monitor the position of the vehicle during its lifetime. The NASA Deep Space Network (DSN) has provided this capability for numerous missions beyond the Earth-Moon system. As more missions are planned and DSN availability becomes constrained, additional methods to maintain accurate navigation solutions, which would reduce the reliance on continuous vehicle tracking and monitoring, become attractive. The development of space vehicle navigation using variable celestial X-ray sources could potentially provide this additional capability, by providing supplementary external measurements that can be processed as part of the orbit determination algorithm in the mission control centers. This new technique also has the potential of providing autonomous navigation abilities via computation onboard the vehicle. These solutions can be used directly for guidance and control. Overviews of the DSN system and the X-ray navigation technology are provided. The development of an integrated navigation system, including an extended Kalman filter that incorporates the spacecraft dynamics and measurements from both types of systems is presented. A simulation is presented that has been produced to investigate the potential of DSN location measurements that are augmented with X-ray source range measurements. Performance capabilities of each separate system and a combined system are provided.