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基于卫星轨道扰动理论的重力反演算法 被引量:6
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作者 游为 沈云中 +1 位作者 范东明 冉将军 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2010年第11期2574-2581,共8页
为了更充分利用低轨重力卫星的高精度观测数据,根据卫星轨道的扰动理论,导出了应用卫星轨道与星间距离观测值联合反演地球重力场模型的算法.该算法的实质是将牛顿运动方程在卫星轨道处进行展开,转化为第二类Volterra积分方程,并采用基... 为了更充分利用低轨重力卫星的高精度观测数据,根据卫星轨道的扰动理论,导出了应用卫星轨道与星间距离观测值联合反演地球重力场模型的算法.该算法的实质是将牛顿运动方程在卫星轨道处进行展开,转化为第二类Volterra积分方程,并采用基于移动窗口的9次多项式内插公式进行数值求解.给出了该算法的观测方程,用QR分解法消去局部参数矩阵,最后采用预条件共轭梯度法求解法方程.利用GRACE卫星2008-01-01~2008-08-01时间段内的轨道及星间距离观测数据,解算了120阶次的地球重力场模型SWJTU-GRACE01S,该模型在120阶处的阶方差为1.58×10^(-8),大地水准面差距累计误差为22.29cm,与美国GPS水准网比较的标准差为0.793m,结果表明:SWJTU-GRACE01S模型精度介于EIGEN-GRACE01S与EIGEN-GRACE02S模型之间,从而验证了该算法的有效性. 展开更多
关键词 卫星轨道扰动 地球重力场模型 牛顿运动方程 星间距离 多项式内插 QR分解
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The unified ideal model of mean motion resonance of artificial satellites due to geopotential perturbations 被引量:1
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作者 ZHANG MingJiang ZHAO ChangYin +2 位作者 XIONG YongQing SUN RongYu ZHU TingLei 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第4期840-847,共8页
From Kaula's Earth gravitational potential written in classical orbital elements, the unified ideal model of mean motion resonance of artificial satellites due to geopotential perturbations is developed in this pa... From Kaula's Earth gravitational potential written in classical orbital elements, the unified ideal model of mean motion resonance of artificial satellites due to geopotential perturbations is developed in this paper first, through a suitable sequence of canonical transformations constructed by implicit functions. This unified ideal orbital resonance model is valid for all the commensurabilities between the rotational angular velocity of the Earth and the angular velocities of mean orbital motion of artificial satellites with arbitrary inclination and small eccentricity, and can be also transformed into Garfinkel's general expression of ideal resonance problem. Then 1/1 resonance of the 24-hour satellite with arbitrary inclination and small eccentricity is analyzed under the effect of harmonics of J2 and J 22 of the geopotential, based on the unified ideal model of mean motion resonance. The analytical expressions of the libration period and libration half width of the 1/1 resonance of the 24-hour satellite with arbitrary inclination and small eccentricity are presented. 展开更多
关键词 artificial satellite mean motion orbital resonance unified ideal model
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