联合串行式和钟摆式卫星编队精确建立下一代HIP-3S地球重力场模型

第一，基于扰动星间距离观测量对地球重力场反演精度的敏感性优于星间距离观测值的特性，本文构建了新型扰动星间距离法（DIRM）.第二，有效检验了下一代HIP-3S编队的轨道稳定性，结果表明：HIP-3S编队较稳定，有利于提高地球重力场反演精度.第三，基于扰动星间距离法，分别利用当前GRACE-2S串行式双星编队和下一代HIP-3S复合式三星编队精确反演了120阶地球重力场，在120阶处累计大地水准面精度为2.271×10^-1 m和1.923×10^-3 m，结果表明：HIP-3S复合式三星编队有利于建立下一代高精度和高空间分辨率的地球重力场模型.

Precise establishment of the next-generation Earth gravity field model from HIP-3S based on combination of inline and pendulum satellite formations

Because the sensitivity of the disturbing intersatellite range measurements to the recovery accuracy of the Earth's gravitational field is superior to that of the intersatellite range measurements, the observation equation of a new Disturbing Intersatellite Range Method (DIRM) is created in this study. Then the orbital stability of the next-generation Hybrid-Inline-Pendulum-Three-Satellite (HIP-3S) formation is efficiently verified. The research indicates that the HIP-3S formation is sufficiently steady for further enhancing the accuracy of the future Earth gravity field model. Finally, the Earth's gravitational field complete up to degree and order 120 is precisely recovered by the current GRACE-2S inline formation and the next-generation HIP-3S combined formation based on the new DIRM. The cumulative geoid height errors are 2.271×10^-1m and 1.923×10^-3 m at degree 120, respectively. The study results show that the future HIP-3S formation is helpful for producing the next-generation Earth gravity field model with higher accuracy and spatial resolution.