导航

Based on a certain engineering development,this paper provides a kind of operation mode and corresponding data optimization method for the integrated navigation system composed of various navigation sensors (such as stabilizedgyrocompass,EN Log,LoranC,etc.).The optimized navigation in formation can effectivel satisfy the requirement of combat system on navigation information (especially on absolute velocity relative to the ground).

本文以某工程型号任务为背景，提出了一种基于平台罗经、电磁计程仪及LoranC定位系统等导航传感器的综合导航系统的工作模式及数据优化处理方法，经优化处理后的导航信息可有效地满足作战系统对导航信息的需求。

With the development of navigation and autoimmunization, the integrated navigation holding various navigation sensor modules comes into being a multi-sensor navigation system.

随着导航技术和控制理论的发展，组合导航系统拥有众多的导航传感器模块，已经构成了一个多传感器导航信息系统。

In this paper,we introduce the main research content and the basic principle of GAN,the situation and development of the gravity sensor ,digital map processing and matching theory in home and abroad,especially the architecture and the research results of Gradiometer As an External Navigation Aid,Gravity Aided Inertial Navigation System.

本文在进行了一般性辅助导航方法的概述之后，详细介绍了与辅助导航相关的重力场基本概念、重力辅助导航系统的主要研究内容、基本原理；从重力传感器、重力图数据处理及重力图匹配理论与算法三个方面详细介绍了其国内外研究现状，重点介绍了重力梯度仪辅助导航、重力辅助惯性导航和通用重力模块三种系统的体系结构和研究成果；总结了重力辅助导航涉及的关键技术及其发展趋势；最后给出了我国开展海洋重力辅助导航研究的若干建议

Gravity navigaton is based on gravity map. A method of constructing gravity map which can meet the demand of navigation is an important step taking account of the gravimeter and the precision of navigation.

重力导航是基于图的导航，根据导航重力仪和导航精度要求的具体情况，寻求能够保证导航定位精度的重力图构建方法是实现重力导航的重要步骤。

The report has presented detailed research on concerned instances of integrated navigation and compared it with the system of the subsonic vehicle. The research has shown that the scheme composed of Changhe Ⅱ loran, Beidou satellite navigation system and GNSS for such subsonic vehicles is feasible and technically realizable.

本文对有关组合导航的实例进行了详细研究，与亚音速飞行器组合导航系统进行了比较研究，表明亚音速飞行器采用"长河二号"无线电导航系统、"北斗"卫星导航系统和全球卫星导航系统进行组合导航是切实可行的，在技术上是完全可以实现的。

The navigation that says here the central navigation besides setting column, still include characteristic navigation, relevant navigation, historical contrail navigation, etc.

这里所说的导航除了设置栏目的中心导航，还包括特色导航，相关导航，历史轨迹导航，等。

The Additional Guide Star (with star flag 5) is come into use for improving the accuracy and speed of star identification. After the cases analysis of unsuccessful star identification, giving the guide star which always cause false star identification a given star flag(such as 6), which denote that the star is a Redundant Guide Star and can't take part in the star identification processing. Through the introduction of Redundant Guide Star, the accuracy of star identification is improving. The distribution of Additional Guide Stars spread all over the whole sky, even the star sparse area.

在选取导航星的过程中，位置精度阈值的引入，使得高精度的恒星作为导航星，为高精度的卫星姿态反演奠定了基础；辅助导航星的引入，与单一使用Tycho-2星表相比引入了大量的亮星(189颗辅助导航星遍及全天球，其中亮于3等星的恒星占34.4%)，且弥补了部分天区恒星稀疏无法满足星图识别条件的不足，这将十分有利于提高星图识别速度和识别率；冗余导航星的剔除，为进一步提高星图识别率提供了可能。

In order to got the more accurate Guide Star(with star flag 0), the stars with magnitude brighter than 6.5 of J1991.25 Hipparcos catalog were chosen, after the rigorous epoch transformation, the J2000.0 Hipparcos sub-catalog was got, with the help of the information of Tycho-2 star catalog and SAO star catalog at the same epoch, the threshold of position precision is introduced, which can meet the precision of attitude determination in arc-second level.

在相同的历元J2000.0时刻，选取J2000.0 Hipparcos星表和Tycho-2星表中位置精度阈值在1角秒内的共星作为导航星，选取除导航星外的J2000.0 Hipparcos星表和SAO星表中位置精度阈值在1角秒内的共星作为辅助导航星，通过模拟星图识别失败个例分析提取冗余导航星，使其排除在导航星之外。

Researches on terrain matching navigation, gravity assistant navigation and geomagnetism assistant navigation have been developed.

重力导航是基于图的导航，根据导航重力仪和导航精度要求的具体情况，寻求能够保证导航定位精度的重力图构建方法是实现重力导航的重要步骤。

Based on the ideal of making most use of the celestial navigation system that is high accuracy,after analyzing the principle and error models of the CNS and inertial navigation system,an error correction algorithm of the CNS/INS integrated navigation is presented.

通过分析导弹天文导航和惯性导航的导航原理和误差模型，在基于充分利用高精度天文导航参数的思想上，提出了组合导航的误差修正方法。

In this section we look at the theory behind the techniques used in rotary polishing and the effects that they have on paintwork and the results achieved.

在这里看抛光剂使用背后的理论，到底是怎么一回事，我们如何用好的抛光机和好的使用技巧来达到好的效果。

I'll dig like a psychotic rodent if I have to.

那我就帮你挖到中国去。