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Evaluation of Time Difference of Arrival (TDOA) Networks Performance for Launcher Vehicles and Spacecraft Tracking

机译：抵达时间差（TDOA）网络绩效的评估，以及航天器跟踪的性能

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Time Difference of Arrival (TDOA) networks could support spacecraft orbit determination or near-space (launcher and suborbital) vehicle tracking for an increased number of satellite launches and space missions in the near future. The evaluation of the geometry of TDOA networks could involve the dilution of precision (DOP), but this parameter is related to a single position of the target, while the positioning accuracy of the network with targets in the whole celestial vault should be evaluated. The paper presents the derivation of the MDOP (minimum dilution of precision), a parameter that can be used for evaluating the performance of TDOA networks for spacecraft tracking and orbit determination. The MDOP trend with respect to distance, number of stations and target altitude is reported in the paper, as well as examples of applications for network performance evaluation or time precision requirement definitions. The results show how an increase in the baseline enables the inclusion of more impactive improvements on the MDOP and the mean error than an increase in the number of stations. The target altitude is demonstrated as noninfluential for the MDOP trend, making the networks uniformly applicable to lower altitude (launchers and suborbital vehicles) and higher altitude (Low and Medium Earth Orbits satellites) spacecraft.
机译：到达的时间差（TDOA）网络可以支持航天器轨道确定或接近空间（发射器和次弓）车辆跟踪，以便在不久的将来增加卫星发射和空间任务。对TDOA网络的几何形状的评估可能涉及精度（DOP）的稀释，但是该参数与目标的单个位置有关，而应该评估具有整个天体中的目标的网络的定位精度。本文介绍了MDOP的推导（最小稀释精度），该参数可用于评估TDOA网络进行航天器跟踪和轨道确定的性能。本文报告了距离，站点和目标高度的MDOP趋势，以及网络性能评估或时间精确要求定义的应用示例。结果表明，基线的增加使得能够在MDOP上包含更加施加的改进，并且平均误差比车站数量增加。目标高度被证明为MDOP趋势的非对策，使得网络均匀地适用于较低的高度（发射器和亚孔械）和更高的高度（低和中型地球轨道卫星）航天器。

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