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What Can We Expect from the Inclined Satellite Formation for Temporal Gravity Field Determination?
Surveys in Geophysics ( IF 4.9 ) Pub Date : 2021-03-30 , DOI: 10.1007/s10712-021-09641-9
Hao Zhou , Zhicai Luo , Zebing Zhou , Fan Yang , Roland Pail , Liangcheng Tu , Hsien-Chi Yeh , Shanqing Yang

The assumption of implementing a Bender-type mission with two pairs of inline satellites by two institutions, one in the inclined satellite formation (ISF) and the other in the polar satellite formation (PSF), has been proven as an optimal selection for the next-generation gravimetric mission (NGGM). The prerequisite of this assumption is to ensure the combination as well as the independency of the missions in the PSF scenario as well as in the ISF scenario. To promote NGGM, we implement a close-loop simulation study to evaluate the performance of the stand-alone ISF mission. In the spectral domain, the ISF estimations show extremely poor quality for zonal and near-zonal coefficients due to the absence of observations over the polar regions, while the sectorial and near-sectorial coefficient estimations show approximately 71 ~ 77% noise reductions when compared with the PSF estimations. In the spectral domain, the ISF mission presents its superior capability in detecting the Earth’s mass variations within its observational areas than the PSF mission. The improvements of ISF are also obtained over the transition zones (50°N ~ 70°N and 50°S ~ 70°S) with 41% noise reductions. In addition, the general better performance of gravity estimations via ISF may promote the potential geoscience applications over the small river basins, the coastal ice sheet and the earthquake areas with better accuracy and finer resolution. The simulation results demonstrate the feasibility of implementing a stand-alone mission in the inclined orbits, and the further possibility of promoting a Bender-type mission via a profound cooperation by two institutions.



中文翻译:

从倾斜卫星编队中确定时间重力场,我们可以期待什么?

事实证明,由两个机构(其中一个是倾斜卫星编队(ISF),另一个是极地卫星编队(PSF))使用两对直列卫星来执行Bender型任务的事实,已被证明是下一轮的最佳选择。代重力任务(NGGM)。这种假设的前提是确保在PSF方案和ISF方案中,特派团的合并和独立性。为了推广NGGM,我们实施了闭环仿真研究,以评估独立ISF任务的性能。在光谱域中,由于没有在极地地区观察到的数据,因此ISF估算显示出纬向和近纬带系数的质量非常差,与PSF估计相比,扇形和近部门系数估计显示了约71〜77%的噪声降低。在频谱领域,与PSF任务相比,ISF任务在检测其观测区域内的地球质量变化方面表现出了卓越的能力。在过渡区(50°N〜70°N和50°S〜70°S)上,ISF也得到了改善,噪声降低了41%。此外,通过ISF实现的重力估计总体上更好的性能可能会以较小的精度和更高的分辨率促进在小流域,沿海冰原和地震地区的潜在地球科学应用。仿真结果证明了在倾斜轨道上执行独立飞行任务的可行性,

更新日期:2021-03-30
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