定轨

Constant Angular Velocity mode and Constant Linear Velocity mode are integrated to build a single spindle motor control module to incorporate with long-seek servo. CAV mode and CLV mode are performed to show its feasibility. The experiment results showed that the pick-up-head can perform arbitrarily track-jump command, quite well.

此外，在主轴马达伺服部分，提出以跨轨旗标讯号来决定使用『碰-碰』控制法则让主轴马达转速变化的执行时间，也将主轴马达伺服中的等角速度控制模组与等线速度控制模组整合成功，形成单一的主轴马达控制模组，使与长寻轨伺服结合而更易於操作，让不论内、外寻轨的任意跨轨命令皆可以达成定线速度或是等角速度的控制目标。

The POD algorithm based on pseudo range and carrier phase epoch-wise differency observations is estimated by the simulated data. Based on the calculation results under different weighting and different GPS ephemeris accuracy, the influence of these factors to the POD results and the selection of the weighting are discussed.

按照实现简洁、精度符合要求的优选标准，研究了利用伪距和载波相位历元差快速几何定轨方法，给出了仿真计算结果，分析了等各种因素对于最终结果的影响，讨论了权因子选取问题。

Provided by the use of IGS precise ephemeris and precision clock bad, you can achieve high-precision positioning and orbit determination, which makes GPS in determining the satellite orbit to monitor the ionosphere and troposphere in the job to play an increasingly important role.

利用IGS提供的精密星历和精密钟差，可以实现高精度定位和定轨，这使得GPS在确定卫星轨道、监测电离层和对流层中的工作中发挥了举足轻重的作用。

During the 20042005 austral summer season, the absolute gravity and relative gravity were measured at the Great Wall Station. The tide gauge was set up in Zhongshan Station in 2000. The SAR interferometry was applied to build the DEM of ice sheet and to monitor the ice flow in the polar region.

具体介绍了以长城站、中山站和黄河站3个GPS观测站为依托，开展的板块运动、卫星定轨及极区大气环境监测方面的研究；GPS在埃默里冰架、格罗夫山及Dome A考察中的应用研究；长城站的高精度绝对重力及相对重力测量；中山站自动验潮站的建立；及合成孔径雷达干涉测量在南极内陆冰盖的应用研究等。

Considering the influence of atmospheric resistance on orbit,and the influence of starlight on the observation with star sensor, atmospheric density has to be taken into consideration in high-precision autonomous orbit determination of satellites.

在卫星高精度自主定轨中，由于需要考虑大气阻力对轨道的影响，以及卫星敏感器观测穿过大气层的星光时，都需要知道大气密度。

Japanese precise linear slide rail of bond head suitable to high precision bonding technics.

压头定位结构采用日本精密线性滑轨取代同行业直线轴承定位结构，以使用于各种高精度软排线邦定工艺所需。

When the precise orbit determination of satellite is performed, the data of laser ranging to satellite obtained at single tracking station can be used for estimating the station location.

当卫星精密定轨后，对单个测站所获得的卫星激光测距资料进行处理，可测定测站的地心坐标。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失