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引力位
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  gravitational potential
     According as the expanding of spherical harmonics of the gravitational potential, the radial correction formula and the estimating error model are given.
     依据地球引力位球谐展开,推导了重力梯度张量的径向归算改正公式,并给出改正误差估算模型。
短句来源
     Discrete approach with 15′×15′ grid is adopted in order to numerically simulate and calculate the gravitational potential field generated by the homogeneous rotation-symmetric ellipsoid,and it is verified that the method,the fictitious compress-recovery and the fictitious downward continuation of the gravitational field,is reliable and valuable at the relative accuracy level higher than 10~(-4).
     采用15′×15′网格离散化手段对均质旋转对称椭球体产生的引力位场进行了数值模拟计算,在相对精度优于10-4的水平上,验证了引力位虚拟压缩恢复法以及重力场虚拟向下延拓法的可靠性和有效性。
短句来源
     In the general condition, the odd zonal harmonic terms(J 2l+1, l>1) in the nonspherical gravitational potential, not only J 3 term, will take significantly effect together to the formulating of frozen orbit of satellite in orbit.
     在一般情况下 ,对于低轨卫星形成冻结轨道的条件 ,非球形引力位中的奇次带谐项 (J2l+1,l≥ 1)将起重要作用。
短句来源
     Based on the theory of vector spherical harmonic functions,this paper discusses influences of the tidal generating force,and the surface stress on the earth deformation as well as the incremental gravitational potential.
     本文基于矢量球函数的基本理论,讨论了引潮力和地表应力对地球形变和引力位增量的影响。 认为地球潮夕形变和负载形变只有球形场位移,而没有环形场位移。
短句来源
     The fictitious gravitational potential solution of a sphere coincides with the earth's real gravitational potential field outside the earth is a series, which was not proved and only previously postulated as a uniformly convergent series.
     引力位虚拟压缩恢复法的基本思想是选定一个位于地球内部的球 ,根据地球表面的引力位 ,通过连续不断的压缩 (到内部球 )与释放 ,构造出了一个级数解 ,在假定该级数解一致收敛的情况下 ,所得到的解在地球外部与地球的真实场完全一致。
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  “引力位”译为未确定词的双语例句
     The ratio between the Love number k_+, which depict the latitude dependence of potential variation due to deformation,and the spherical symmetric part of Lovenumber,k_0+δk_0, are smauer than 3.0‰:2.67‰ for O_1 wave;
     对M_4波为0.88‰.描述地球引力位变化的Love数的纬度依赖部分系数k_+与球对称部分k_0+δk_0之比小于3.0‰; 对O_1波为2.67‰;
短句来源
     If the angel measurement is as accurate as 10-4 -10-5 (2" - 20" ), the oblateness of the Earth should be considered in the orbit computing.
     若测角资料达到10~(-4)-10~(-5)精度(相当于2"-20"之间),那么要使定轨精度达到与其相应的程度,地球非球形引力位中的扁率项摄动应该考虑,在此前提下,同样可以采用相应的Laplace型定轨方法。
短句来源
     We derive the formulas of the geopotential coefficients ~1_2 and ~1_2 for EGM96 model.
     同时基于EGM96地球引力位模型 ,给出了地球引力位系数 C12 和 S12 的理论公式 .
短句来源
     By using the orbit integration method the expected accuracy of recovering the geopotential model in SST gravity missions is simulated and detected on the assumption that the orbit error, accelerometer error, intersatellite range and range rate error equal to 5cm, 8cm respectively.
     假定轨道、加速度计、星间距离及星间速度误差分别为5cm及8cm,1×10~(-8),m/s~2,及1×10~(-9)/s~2,10μm及1μm/s的情况下,利用轨道积分算法模拟和检测了由卫卫跟踪重力卫星测量模式恢复地球引力位模型的精度。
     EXPERIMENTAL TESTS ON FICTITIOUS COMPRESS-RECOVERY APPROACH AND FICTITIOUS DOWNWARD CONTINUATION OF THE GRAVITATIONAL FIELD
     验证引力位虚拟压缩恢复法以及虚拟向下延拓
短句来源
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  相似匹配句对
     Fictitious Compress-Recuperation of Gravitational Potential
     引力虚拟压缩恢复法
短句来源
     The Attraction of the Map
     地图的引力
短句来源
     GEOCHEMICAL POTENTIAL
     地球化学
短句来源
     prostrate,D.
     俯和 D.
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     The speed of gravity
     引力的速度
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  gravitational potential
The use of the Earth's gravitational potential for interplanetary flights
      
We investigate regions near the ends of the principal spiral arms in SB galaxies, where the non-axially symmetric part of the gravitational potential rapidly transforms to its asymptotic quadrupole form.
      
The behavior of the gravitational potential outside the region where the main spiral arms of galaxies are located is investigated.
      
It is natural to interpret these quarter-turn spirals as the response of the galactic disk to the gravitational potential of the main spiral arms.
      
We use the same model to study the generation and evolution of spiral density waves in the stellar disks of galaxies as a result of the recently found asymmetry of the gravitational potential in the massive dark haloes in disk galaxies.
      
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The refinement of the earth's gravity field is one of the important tasks in phy-sical geodesy. The development of science and technology has provided a lot of infor-mation on the earth's gravity field. It is possible to determine the parameters of this field by combining various types of data. In the process of combination, it is necessary to assign appropriat weights to various types of data according to their spectrum and ac-curacy(Wenzel 1982).

利用地球重力场任意一种有关信息都可以描述地球重力场一定的情况。根据卫星轨道摄动观测求定的引力位球谐系数只能表示地球重力场的长波分量。大地水准面起伏是地球扰动引力场越来越丰富的有用信息,但目前用其计算的引力位系数也只是在低阶较准确。重力异常、垂线偏差、单层密度和纯重力异常都利于求定高阶位系数,其中与大地水准面起伏有关的量,如纯重力异常和单层密度,用它们计算位系数等于联合应用大地水准面和重力异常,故用其计算的位系数在低阶次精度也较好。重力异常垂直梯度是描述扰动引力场细部最有利的信息。本文给出利用各种类型观测资料计算位系数精度估计式,提出综合利用各种资料求定位系数依资料类型的谱特性赋权的方法。

In this paper, the deformation effects of the elastic Earth caused by the rotational centrifugal force are discussed; The resulting deflaction of vertical is less than 0".001, and can be neglected in the measurement of classical astrometry. The resulting drift of a point on the surface of the Earth reaches to 1 cm, the corrections to the tesseral coeficients of Earth potential of second order are of magnitude of order 10~(-10).It seems be necessary to reckon with them in the measurement of SLR.

本文讨论了弹性地球在自转离心力作用下的形变效应。由此引起的垂线偏离小于0.″001量级,在经典天体测量中可以忽略。测站位移达厘米级,地球引力位二阶电谐系数的修正为10~(-10)量级;这些影响在激光侧卫中应予考虑。

This paper presents a sort of method for the computation of gravity anomaly and its derivatives of different order due to an arbitrarily shaped body in the traditional train of thought, i.e., from the concept in classical potential theory. To perform the numerical calculation, one can apply the routines of numerical integration. By the tests on models it has been proved that the method is valid and has a satisfactory precision.

本文按传统的思路,即从经典场论中密度体的引力位出发,导出了可以计算任意形体的重力异常及其各阶导数的方法。在数值计算方面可取用一般常用的数值积分法。理论模型计算的结果表明了方法的正确性及具有令人满意的精度。

 
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