引力势、惯性和地球自转
Gravitational potential, inertia and Earth rotation
摘要：
已经发射了几个专门研究地球重力场的卫星飞行任务（如最近的CHAMP）。今年，GRACE（重力恢复和气候实验）将使我们能够获得更精确的大地水准面。但最重要的是，它们将提供地球位势系数（称为斯托克斯系数）的时间变化。在海报中，我们展示了地球引力势如何与地球自转参数相关联。实际上，通过地球惯性系数，我们可以将LOD和极移的变化与Stokes系数的时间变化联系起来。我们还考虑了章动，这是相关的重力位系数。我们讨论的可能性，使用斯托克斯系数，以提高我们的知识的地球自转。
英文摘要：
Several satellite missions, devoted to the study of the Earth gravity field, have been launched (like CHAMP, recently). This year, GRACE (Gravity Recovery and Climate Experiment) will allow us to obtain a more precise geoid. But the most important is that they will supply the temporal variations of the geopotential coefficients (called Stokes coefficients). In the poster we show how the Earth gravitational potential is linked to the Earth rotation parameters. Indeed, through the Earth inertia coefficients, we can connect the variation of LOD and Polar Motion with the temporal variations of the Stokes coefficients. We also consider the nutations, that are related to the gravitational geopotential coefficients. We discuss the possibility of using the Stokes coefficients in order to improve our knowledge of the Earth rotation.
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。
