论文标题
使用卫星之间的空间频率信号传递技术的重力场建模
Gravity field modeling using space frequency signal transfer technique between satellites
论文作者
论文摘要
在这里，我们提供了一种基于低轨道目标卫星（TS），地静止卫星（GS）和它们之间的微波信号链接的替代方法来确定地球外部重力电位场。通过发射和接收由TS和GS之间精确时钟控制的频率信号，我们可以确定TS轨道处的重力电势（GP）。我们将TS设置为极地轨道，地面上方约500公里的高度，并设有三个均匀分布的GSS，该GSS带有赤道轨道，距离地球中心约35000公里。在这种情况下，可以在任何时候通过频率信号链路观察到TS至少一个GS。通过这种方式，我们可以确定在TS定义的球体（TDS）上的潜在分布，这是最适合TS轨道的球体。然后，基于TDS的潜在分布，可以确定地球的外部重力场。仿真结果表明，如果光原子时钟的不稳定为$ 1 \ times 10^{ - 17}τ^{ - 1/2} $，则基于30天观察的提交的电位的准确性可以达到分解值。这项研究中提出的配方可能会丰富确定地球外部重力场的方法。
Here we provide an alternative approach to determine the Earth's external gravitational potential field based on low-orbit target satellite (TS), geostationary satellites (GS), and microwave signal links between them. By emitting and receiving frequency signals controlled by precise clocks between TS and GS, we can determine the gravitational potential (GP) at the TS orbit. We set the TS with polar orbits, altitude of around 500 km above ground, and three evenly distributed GSs with equatorial orbits, altitudes of around 35000 km from the Earth's center. In this case, at any time the TS can be observed via frequency signal links by at least one GS. In this way we may determine a potential distribution over the TS-defined sphere (TDS), which is a sphere that best fits the TS' orbits. Then, based on the potential distribution over the TDS, an Earth's external gravitational field can be determined. Simulation results show that the accuracy of the potential filed established based on 30-days observations can achieve decimeter level if optical atomic clocks with instability of $1\times 10^{-17}τ^{-1/2}$ are available. The formulation proposed in this study may enrich the approachs for determining the Earth's external gravity field.
