| 1. | Iers , international earth rotation
国际地球自转服务 |
| 2. | Earth rotation parameter
地球自转参数 |
| 3. | Deciding when to introduce a leap second is the responsibility of the international earth rotation and reference systems service
国际地球自转服务组织负责决定何时加减闰秒。 |
| 4. | Based on classical dynamical equation on elastic oarth rotation , an associated dynamical equation containing both nutation and wooble of earth rotation has been deduced through introducing motion of nutation frame with respect to inertial spatial frame
基于经典的弹性地球自转动力学理论，通过引入章动参考系相对惯性空间的运动，建立了弹性地球极移和章动的联合动力学方程。 |
| 5. | Abstract : this paper analyzes the astronomical backgrounds , such as the positons of celestial objects , variation in the earth rotation and solar activities , etc . , for the recent three moderate and strong earthquakes from chengjiang earthquake to qiubei earthquake in yunnan province
文摘:分析了澄江地震至丘北地震期间云南发生的3次中强震时的天体位置、地球自转与太阳活动等天文背景。 |
| 6. | The north border of the basement , extended from west to east along the north latitude 38 , this latitude structure zone is part of the zone in the middle of ordos basin along the north latitude 38 , this is caused by the rate of earth rotation , according with the condition of global harmonic function
压陷北界沿北纬38带东西向展布，该纬向构造是沿鄂尔多斯盆地中部38带分布的纬向构造带的一部分，是由地球自转速率变化引起，符合全球协和函数的条件。 |
| 7. | Jt91 - 200 artillety gyro altazimuth is a fix instument which can research the grid north automatically and determine grid north azimuth at any direction . it works by making use of the physical features of gyro and influences of earth rotation . the equipment of this instument will play a important role in topographic clement
Jt91 - 200型炮兵陀螺经纬仪是利用陀螺本身的物理特性和地球自转的影响，实现自动寻找其北方向和测定任一方向线的真北方位角的定向仪器。该型炮兵陀螺经纬仪的装备使用，对我军炮兵测地分队的测地保障发展将产生重大影响。 |
| 8. | With the wind , pressure and sea surface temperature ( sst ) data provided by ncep / ncar reanalysis project and excess length of day ( lod ) data provided by international earth rotation service ( iers ) , atmospheric angular momentum ( aam ) and its horizontal and vertical transportation are computed and analyzed , which are in accordance with maintenance of the zonal circulation . and the anomalous aam is highly consistent with el nino events
应用ncep / ncar40年再分析计划提供的风场、气压场、海温等资料以及国际地球自转服务局( iers )提供的日长变化资料，计算大气角动量及其水平、垂直输送，分析其气候及异常特征，发现角动量及其输送与纬向环流的维持相一致，角动量异常与厄尔尼诺事件紧密相关。 |
| 9. | Coriolis force is the earth rotation movement in fluence result , according to the newtonian mechanics principle and the law of motion , the analysis coriolis force the production and the essence , asks to calculate coriol is force the size and the direction , finally have discussed coriolis force the influence and the application
摘要地转偏向力是地球自转运动影响的结果，根据牛顿力学原理和运动定律，分析地转偏向力的产生和实质，求算地转偏向力的大小和方向，最后探讨了地转偏向力的影响和应用。 |
| 10. | This method offers more precise geometry for spaceborne sar system design and simulation . 3 . in the analyzing on the radar doppler properties , under the ellipsoid earth model and ellipse orbit model , considering the earth rotation , the radar doppler properties with different orbit eccentricity are compared , and the fact that orbit eccentricity affects doppler frequency rate is found
在雷达多普勒特性分析中，论文采用椭球地球模型和椭圆轨道模型，结合地球的自转，通过不同偏心率下雷达多普勒特性的比较，研究了轨道偏心率对合成孔径雷达系统设计与模拟软件研究雷达多普勒调频斜率的影响。 |
