查询词典 satellite

Whether in civil mobile satellite communications or military satellite mobile communication systems, it will have important significance.

所以，无论是在民事卫星移动通信系统中还是在军事卫星移动通信中都有重要应用价值。

In satellite communications, the point at which the satellite is at a minimum distance from earth in its orbit.

在卫星通信技术中，卫星在其轨道上离地球距离最近的位置。

Then,the cosine value of central angle between the spacecraft and the descending node is solved by using cosine theorem of spherical geometry to avoid the cumbersome solving process by judging the flight direction of a satellite and the latitude of sub-satellite point in an original calculation model of image motion speeds.

通过球面几何的余弦定理直接求解航天器与降交点相对地心夹角的余弦值，避开了原像移速度计算模型中通过判断卫星飞行方向和星下点纬度来求解航天器与降交点相对地心夹角余弦值这一过程。

The invention comprises an antenna for receiving a satellite broadcasting signal; antenna coupling member. The antenna coupling member includes a coupling pin and a holding part. The coupling pin is electrically coupled with the socket of the mobile communication terminal for enjoying the satellite broadcasting and the said antenna. The antenna coupling member is coupled with the antenna. While the said antenna coupling member is coupled with the socket, the holding part is used for pluggable supporting the mobile terminal.

本发明包括如下几个部分：天线，它可以接收卫星广播信号；天线连接构件，它带有一个用于导电连接可欣赏卫星广播的移动通信终端的插口与上述天线的连接针，所述的天线连接构件结合于上述天线，在上述连接针连结于上述插口的同时，通过把持部可插拔地支撑于上述移动通信终端。

He pointed to last month's anti-satellite test in which China fired a missile into a defunct weather satellite

他指的是中国上个月进行的反卫星导弹试验。

US commercial satellite collide with a defunct Russian satellite in space.

美国商业卫星和俄罗斯报废的卫星在太空中相撞。

The research on the CCD sensor information is used to determinate the satellite attitude system without gyroscope .(1) Using quaternion and MRP as attitude representation , the attitude kinematics function are established . The satellite attitude dynamics function is established,that is disturbed by the first-order Markov force moment.(2) Using the quaternion as attitude representations, the attitude determination state estimator EKF and UKF are designed , numerical simulation is done .

基于CCD星敏感器的无陀螺测量卫星姿态确定系统的研究(1)针对地球同步轨道卫星，分别建立了以姿态四元数和修正罗德里格参数为卫星姿态描述参数的姿态运动方程；建立了卫星受一阶马尔柯夫干扰力矩时的卫星姿态动力学方程；(2)设计了采用姿态四元数为卫星姿态描述参数的EKF和UKF估计器，设计了分别以姿态四元数和修正罗德里格参数为卫星姿态描述参数的UKF估计器，并进行了数学仿真。

Realization procedure is given, along with the key steps including clutter cell division, coordinate transformation among main satellite, concomitant satellite and antennas, generation of correlated-K distribution random sequence and parameter determination of clutter cells.

给出了仿真的具体流程，包括散射单元的划分、主辅星及天线之间的坐标转换、相关K分布随机序列的生成以及散射单元参数的确定。

To measure the satellite oscillator frequency accurately is of great significance for transmitting time and frequency information by satellite,and the difficult point of the measurement is to deal with the Doppler frequency shift.

星载振荡器频率的测量对利用通信卫星进行标准时间和频率传递有重要的意义，测量的难点是多普勒频移的处理。

The first set of data collected by the energetic particle detectors on board of the ZY-1, a China Brasilia coordinated earth resource satellite,were introduced briefly in this paper.ZY-1 is a polar orbiting satellite at an altitude of 780?

对搭载于我国第一颗地球资源卫星上的"星内高能粒子探测器"首批资料进行初步分析表明，在卫星780km轨道高度上所纪录到的所有高能粒子通量事件都只出现在3个地理区域，即两半球的高纬极光带和南大西洋地磁异常区。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。