CDMA作为一种抗噪声强、带宽分配灵活，保密性强的传输接入方式被广泛的应用于民用、军用低轨卫星通信系统中。
CDMA technology is widely used in LEO satellites communication because of many merits offered by CDMA system such as suppression of ingress noise, flexibility of bandwidth assignment and the security.
无线资源管理是低轨卫星通信系统中的一个重要的研究方面。
An important aspect of LEO satellite communication system is to manage the radio resources.
研究的设计方案预期能成功应用到各种卫星姿轨控系统的软件研制、星载其它软件的研制，也能应用于地面实时测控系统中。
The method described in this paper can be applied to design the other software system of satellite and the real-time ground control systems.
该文讨论了使用中轨共地面轨迹星座建立区域覆盖卫星通信系统的优化设计方法。
An optimization design method for implementing regional coverage satellite system with common-track constellation is proposed.
同时以hitsat小卫星的电源分系统的故障诊断为例，证明该模型在小卫星在轨故障诊断系统中的有效性和可用性。
Furthermore, taking the power subsystem's fault diagnoses of HITSAT small satellite as an example, we have proved the validity and usability of this model in the paper.
因此，研究高轨环境下微弱导航信号的捕获是极其重要的，它是解决高轨卫星星载GPS应用中的一个关键技术。
So it is important to study the acquisition of weak navigational signal in geostationary orbit environments, and it is a key technique to the application of GPS onboard GEO.
卫星激光合怍目标技术是卫星激光测距系统的重要组成部分，广泛应用于导弹、人造卫星和月球等激光测距系统中，是实现高精度测距和精密定轨的关键技术。
Laser cooperative targets is an important instrument of satellite laser ranging system, and has been applied widely in laser range system of missiles, man-made satellite and moon, etc.
以某极轨对地观测卫星为背景，分析了姿态控制系统中单机部件出现故障时，系统将会出现的状态变化情况，找出故障部件的判定方法；
This article analyzes the status change in the attitude control system when faults appear based on one polar orbit satellite, and provides a method to decide faulty component.
针对卫星精密定轨过程中观测资料存在粗差以及观测资料的合理定权问题，将抗差方差分量估计引入到卫星精密定轨中。
In this paper, the robust variance component estimation is introduced into the satellite orbit determination to resist the effects of outlying observations and to determine the weights.
电离层掩星观测中，当低轨卫星(LEO)轨道高度较低时，轨道以上的电离层电子总含量(TEC)对掩星反演的影响不能忽略。
When the low-Earth orbit (LEO) satellite is low, the contribution of the Total Electron Contents (TEC) above the satellite is not neglectable for inversion of GPS-LEO ionospheric occultation.
铱公司还说，它期望在30天之内用八颗在轨备用卫星中的一颗来替代失去的卫星。
Iridium also said it expected to replace the lost satellite with one of its eight in-orbit spares within 30 days.
低轨卫星移动通信系统中，高效的位置管理方案可以降低系统开销并且能够保证网络系统的性能。
The excellent location management scheme can reduce the system cost and improve the performance of the Low Earth Orbit Satellite Mobile Communication system.
对双星定位系统在中低轨卫星轨道确定中的应用做了详细的分析，给出了在该系统的测量模式下中低轨卫星定轨的几种方法。
The application of Bi-satellite positioning system to LEO or MEO satellite orbit determination be analyzed and discussed some corresponding orbit determination methods.
卫星发射及在轨飞行中，环境变化会影响三线阵c CD相机的内方位元素。
The inner orientation elements of the three-line-array CCD camera are affected by the change of the circumstance during the satellites launching and flying on the orbit.
卫星精密定轨中，需要计算天球坐标系(CRF)到地球固联坐标系(TRF)之间的转换。
For precise satellite orbit determination, the transformation should be done between the Celestial Reference Frame (CRF) and the Terrestrial Reference Frame (TRF).
卫星在发射过程中的振动环境比其在轨运行时更为恶劣，整星隔振和卫星局部减振可以使卫星的动力学环境得到改善。
The whole-spacecraft vibration isolation technology and the spacecraft local vibration attenuation can improve the dynamic environment of the spacecraft.
卫星在发射过程中的振动环境比其在轨运行时更为恶劣，整星隔振和卫星局部减振可以使卫星的动力学环境得到改善。
The whole-spacecraft vibration isolation technology and the spacecraft local vibration attenuation can improve the dynamic environment of the spacecraft.
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