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arXiv 1109.6201gr-qcphysics.space-ph
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空间相对论导航系统

A relativistic navigation system for space

Angelo Tartaglia, Matteo Luca Ruggiero, Emiliano Capolongo

摘要:

我们在这里提出了一种方法的相对论定位在时空的基础上接收脉冲的电磁信号源的世界线是已知的。该方法是基于使用一个四维网格覆盖整个时空和零超曲面代表的传播脉冲。在我们的第一种方法定位的问题,我们认为无线电天线在无限远的主要来源所需的信号。原因是,除了是非常好的时钟外,恒星可以被认为是相当长时间的恒星。定位获得线性化的几个周期的信号的顺序的时间的观察员的世界线。我们提出了一个练习,其中使用我们的方法适用于从四个真正的恒星的信号允许重建的运动地球相对于恒星在三天。讨论了该方法的不确定性和约束条件,并讨论了利用太阳系天体或航天器携带的移动人工源的可能性。

英文摘要:

We present here a method for the relativistic positioning in spacetime based on the reception of pulses from sources of electromagnetic signals whose worldline is known. The method is based on the use of a four-dimensional grid covering the whole spacetime and made of the null hypersurfaces representing the propagating pulses. In our first approach to the problem of positioning we consider radio-pulsars at infinity as primary sources of the required signals. The reason is that, besides being very good clocks, pulsars can be considered as being fixed stars for reasonably long times. The positioning is obtained linearizing the worldline of the observer for times of the order of a few periods of the signals. We present an exercise where the use of our method applied to the signals from four real pulsars permits the reconstruction of the motion of the Earth with respect to the fixed stars during three days. The uncertainties and the constraints of the method are discussed and the possibilities of using moving artificial sources carried around by celestial bodies or spacecrafts in the Solar System is also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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