查询词典 geoid

Firstly, the new single and combined analytic error models of cumulative geoid height influenced by four error sources including the intersatellite range-rate of interferometric laser ranging system, orbital position and velocity of GPS receiver and nonconservative force of accelerometer from GRACE Follow-On satellites are established using the power spectrum principle, respectively.

第一，基于功率谱原理分别建立了新的GRACE Follow-On卫星激光干涉星间测量系统星间速度、GPS接收机轨道位置和轨道速度以及加速度计非保守力误差影响累计大地水准面的单独和联合解析误差模型。

In view of an analysis from lithospheric geoid, horizontal stress and existing seismic tomographic data and so on, they show that Chinese mainland and adjacent area is controlled by mantle dynamics of interaction, mutual influence and constraint by western Pacific ocean plate, Indian plate and circum-Siberian arc tectonics that formed after Paleo-Asian ocean closed, which consist of three tectonic areas, with on the base of the Tethyan tectonic realm. Overall tectonic framework of the Chinese mainland is outwards obduction along main tectonic borders within shallow crust and inwards subduction and convergence within deep lithospheric mantle from south-western, south-eastern and northern parts, respectively.

基于岩石圈大地水准面异常、水平应力场和地震层析等地球物理资料综合分析可知，中国大陆及其毗邻地区在特提斯构造基础上，处于西太平洋板块、印度板块和古亚洲洋及其闭合之后环西伯利亚弧形等三大全球构造体系域相互作用、相互影响和相互制约的地幔动力学控制之下，总体大地构造格局是浅部地壳分别沿主要构造边界向外仰冲，深部岩石圈地幔则从西南、东南和北部向中国大陆俯冲会聚，使之整体处于地幔会聚挤压的大地构造背景。

According to this research, the root mean square error could achieve ±1.156cm,±1.253cm and ±1.376cm by adopting hyperbolic mode, three times of the distance mode and distance square model. Its precision is good enough for engineering measurement. It provides not only the quicker methods to measure the orthometric height on survey engineer, but also a academic reference on regional geoid model

实验结果发现，经数学模式改正后双曲线模式、距离三次方模式及距离平方模式分别能达到±1.156cm、±1.253cm及±1.376cm合乎工程测量规范之标准，本研究在工程上不仅提供实务上快速测得正高的方法，於学术上亦可提供区域性大地起伏模型相关研究之参考。

The methods for the recovery of gravity filed from satellite altimetry are summarized and studied and the geoid and gravity anomaly grided in 2.5′×2.5′ size over china are recovered from multi-satellite altimetry data. Two methods are used to recover gravity.

6总结并研究了由测高数据恢复海洋重力场以及分离海面地形的方法；利用多代卫星测高资料，以测高轨迹海面高剖面梯度采样为基础数据，分别由垂线偏差法和最小二乘配置法反演了2.5′×2.5′中国海域的重力异常和大地水准面差距；然后采用移去-恢复由高斯滤波方法从平均海面高中分离出15′×15′中国海域的动力海面地形。

In this paper, the basic knowledge of GPS, CORS have been introduced briefly, and the theory and methods of refining the local geoid based upon GPS or CORS have been discussed in detail.

本文首先介绍了GPS、CORS的基本知识，详细阐述了基于GPS技术的昆明市大地水准面精化理论和方法，并利用多年基础测绘资料，确定了昆明市1000平方公里范围内数字高程异常等值线。

Historically, datums have been based on ellipsoids that best represent the geoid within the region the datum is intended to map.

历史上，大地基准面一般基于与制图区域大地水准面最接近的地球椭球面构建。

It is commonly used by geodesists and geophysicists to analyze geoid undulations and study crustal deformation.

它包括了大地水准面和海面地形两部分信息，因而广泛地用于研究大地水准面、瞬时海面高、大洋环流等问题。

The results show that within the Philippine Sea and the South China Sea, short wavelength lineations of the geoid undulation are parallel or cross to magnetic lineations and rifting ridges.

结果表明，菲律宾海和南海显示了与磁条带、扩张脊对应或斜交的高频成分大地水准面起伏条带。

The experimental result shows that the new method can improve the inner and outer precisions of fitting two kinds of quasi-geoid clearly.

新方法提高了两面拟合结果的内、外符合精度。

The geoid is used to be regarded as the theoretic global vertical reference .The actual national height references are regional mean sea levels determined by tide gauge station. The difference between them is apparent. The satellite altimetry has developed as a kind of important space geodetic technique since 1970s.

大地水准面作为全球高程测量的理论基准面，在现实工作中，国家或者地区高程系统的起算面是利用验潮方法来确定局部平均海平面的，两者之间的差距是显而易见的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。