平面二维时空中的定位：延迟主方程
Positioning in a flat two-dimensional space-time: the delay master equation
摘要：
关于二维时空中的相对论定位系统的基本理论已经在两篇先前的论文[Phys. Rev. D { \bf 73}，084017（2006）; { \bf 74}，104003（2006）]中提出，其中已经通过考虑具体实例分析了利用这些系统进行相对论重力测量的可能性。在这里，我们研究一般的相对论定位系统在闵可夫斯基平面。我们分析可以从定位系统的用户接收的数据中获得的信息。我们表明，沿其轨迹的发射器和用户的加速度是由发射器定位数据和只有一个发射器的加速度的唯一知识。此外，由于所谓的主延迟方程，仅在回波间隔期间需要该加速度的知识，即，一个发射器发射信号的时间和被另一个发射器反射后接收信号的时间之间的间隔。我们说明这些结果与获得的动态的发射器和用户从特定的数据集接收到的用户。
英文摘要：
The basic theory on relativistic positioning systems in a two-dimensional space-time has been presented in two previous papers [Phys. Rev. D {\bf 73}, 084017 (2006); {\bf 74}, 104003 (2006)], where the possibility of making relativistic gravimetry with these systems has been analyzed by considering specific examples. Here we study generic relativistic positioning systems in the Minkowski plane. We analyze the information that can be obtained from the data received by a user of the positioning system. We show that the accelerations of the emitters and of the user along their trajectories are determined by the sole knowledge of the emitter positioning data and of the acceleration of only one of the emitters. Moreover, as a consequence of the so called master delay equation, the knowledge of this acceleration is only required during an echo interval, i.e., the interval between the emission time of a signal by an emitter and its reception time after being reflected by the other emitter. We illustrate these results with the obtention of the dynamics of the emitters and of the user from specific sets of data received by the user.
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