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精密和详细测定地球重力场及其随时间变化,是目前卫星重力测量的主要课题。基于目前高精度的固体潮展开,研究固体潮对地球重力场时变特征的影响。不同于IERS2000推荐的固体潮对重力影响的理论模型,独立于天体历书而基于精密引潮力位展开直接给出在毫微伽精度下的潮波公式,并考虑到四阶潮汐的效应。同时对重力数据归算中的永久性潮汐的处理进行总结和说明。本文的工作可为高精度的地球重力场的研究提供理论依据和参考。 更多还原

【Abstract】 It is a main subject of Gravisat at present that we survey gravitational field and variety of gravitational field with time accurately in detail. The solid earth tide is known to cause the temporal variations in the gravitational field. Rather than the theoretical model recommended by IERS2000, we directly derive the ngal-level tidal wave formulas from the precise tide-generating potential (TGP) expansion and take the tidal terms of the fourth-order into account. We summarize and explain the tre... 更多还原