查询词典 orbit determination

Whereas analytical method and the before-mentioned numerical method have some places to improve and the determination characteristics of satellite of middle-low orbit, this paper presents a new numerical project of determination of obvious characteristics on condition that range of determination is not very long and the precision of determiantion is the meter grade, and is realized by a software.

鉴于分析法定轨和上述通常采用的数值法定轨都有各自可改进之处，本文针对一般中低轨卫星定轨的特点，在弧段不太长和定轨精度为米级的情况下，给出一种具有明显特点的数值定轨方案，且以软件具体实现了这种方案，并经受了实测资料的考验。

The determination of the orbit of mobile target is an important factor affecting the firing accuracy.

目标机动是一个灰色系统。机动目标运动规律的确定是影响射击精度的重要因素。

Firstly this paper introduces some basic information about the determination of satellite orbit, including time systems, coordinate systems, the definition of these systems and the transfer between different systems.

文中首先介绍了卫星定轨的一些基础知识，主要包括时间系统、坐标系统的定义和不同系统之间的转换关系。

In the course of determination orbit, the on-board GPS surveying plays a crucial role, that is the quality of the on-board GPS data.

其中对轨道精度起决定性作用的就是星载GPS测量的精度，也就是星载GPS数据的质量。

Several years later, he was entrusted with the subject of "The Determination and Forecast of Spaceship's Reentry Orbit".

几年后，他承担了"飞船返回轨道的测定与预报"课题。

In the direct-location, with the precise model of satellite motion and its osculating parameters, a more accurate formula for the orbit calculation of satellite is obtained. Meanwhile, the determination of the position information of each pixel is more accurate with the precise model of earth shape.

二、直接定位中，通过建立精确的卫星运动轨道模型、卫星摄动模型，优选确定了卫星轨道计算公式，以提高卫星轨道计算精度；同时，采用对称椭球体的地球形态模型和融入卫星姿态的地面扫描点位置的计算方法，可使确定的地面扫描点的地理位置更精确。

The determination method of descending/ascending node, longitude of ascending node and frozen orbit parameters for sun-synchronous orbit satellite design was analyzed on the basis of six general orbital elements.

在轨道六要素的基础上，分析了卫星太阳同步轨道设计时降交点地方时、升交点赤经，以及冻结轨道参数等的确定方法。

The determination method of descending/ascending node, longitude of ascending node and frozen orbit parameters for sun-synchronous orbit satellite design was analyzed on the basis of six general orbital elements.

引言卫星的轨道设计一般可分为地面覆盖、轨道复现、卫星组网、星下点照明和卫星受照要求等几类[1]。

In satellite formation flight, the measurement and determination of independent relative orbit is one of the most important techniques of formation flight.

编队飞行卫星群自主式相对轨道测量和确定是绕飞轨道的关键技术之一，考虑了利用星敏感器和雷达以及利用GPS信号来进行相对定轨的传统方式，提出了基于伪卫星技术的定轨方案。

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。