查询词典 orbit determination

Algorithms of on-board GPS real-time single point positioning and dynamic orbit determination using positioning solutions are mainly studied.

本文重点研究星载GPS单点实时定位和基于单点定位结果的动力学定轨方法。

Open loop Doppler data have been used in the orbit determination of Mars Express.

开环多普勒数据已经开始尝试用于卫星的定轨，今后有关开环多普勒数据的科学应用也在准备中。

Furthermore, a strategy of precise orbit determination for lunar satellites is presented, which combines analytical and numerical methods. It is assessed to be reliable and practical.

在此基础上，建立了一种数值方法和分析方法相结合的月球卫星精密定轨方法，并以仿真计算证实了方法的可靠性与应用前景。

Lambert theorem plays an important role in orbital interception and initial orbit determination.

Lambert方程在轨道拦截和初始轨道确定起着重要作用。

In this paper,the scheme of autonomous orbit determination of satellite is described,the extended Kalman filter algorithm based on improved numerical method is put forward.

高精度的自主定轨对探测器实现深空探测任务有着重要的意义，结合利用星光折射角的测量确定卫星轨道的自主导航方案，提出了基于数值算法改进的扩展卡尔曼滤波算法，提高了运算精度，通过仿真验证了该算法的优越性。

SLR is one of the important space geodetic advanced techniques. It provides precise range between a laser station and a satellite that is equipped with retroreflectors. In the dissertation, the precis orbit determination on SLR technique is researched.

SLR技术是现代空间大地测量最先进技术之一，它可以为人造卫星提供精密的距离观测，本文系统地研究了SLR技术在卫星精密定轨中的有关技术问题。

In view of the practice of precise orbit determination and parameter solution, the difference algorithm to compute state transition matrix is proposed.

根据精密定轨和参数解算的实际需要，提出用差分算法，即通过两条很接近的轨道的差来计算状态转移矩阵。

Unscented Kalman filter Scaling factor Adaptive processing Simplex method Orbit determination Satellite

无迹卡尔曼滤波；比例因子；自适应处理；单形法；轨道测定；卫星

This paper focuses on the precise orbit determination problem of the Low Earth Orbiters using double-frequency observations of the Global Position System. A simulation platform is built up, which is used to generate the satellites-to-satellites tracking data, as a tool to validate the algorithm developed for the future application of GPS sensors on the LEOs.

本文结合最近几年来国外低轨卫星GPS定轨技术的最新发展情况，研究了基于双频GPS测量技术的低轨卫星精密几何定轨问题，建立了低轨卫星GPS定轨的仿真平台，并用之作为关键技术的验证手段，研究了旨在获得分米精度的快速几何定轨算法和结果精度评估方法。

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。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。