| 1. | World geodetic system - 1984 wgs - 84
年世界大地坐标系 |
| 2. | World geodetic system - 1984 wgs
年世界大地坐标系 |
| 3. | Wgs - 84 - world geodetic system
年世界大地坐标系 |
| 4. | The problem of marine simulation and ship maneuvering motion is mainly and usually studied in traditional two right - handed coordinate systems , i . e . , the space - fixed and body - fixed
武汉理工大学硕士学位论文船舶在水平面上的运动可以用serret一frenet标架和大地坐标系两种坐标系来描述。 |
| 5. | Bistatic wind fields synthesis equations are analysed and i educes target location equation in receiver including conversion from ground reference frame to one defined by us
分析了双基地雷达风场合成公式，推导了双基地雷达中目标在子站中的定位方程，其中涉及到从大地坐标系到本课题所定义的坐标系的转换。 |
| 6. | This paper discusses how to scientifically employ a geocentric 3d coordinate system in china and analyzes three main scientific problems involved in this regards , i . e . the definition of the system , the geodetic fundamental constants and tidal correction
摘要讨论了我国科学地采用地心三维大地坐标系，主要涉及到的该坐标系的定义、采用的大地测量基本常数以及与此有关的潮汐改正等三个问题。 |
| 7. | 3 . for geographic coordinates and cartesian coordinates transformation a model that include 7 parameters and the guess - kruger projection were used . the difference of calculation between the above method and trimble tgo software is less than 1cm
选用了7参数布尔莎模型进行wgs - 1984空间直角坐标系与北京1954空间直角坐标系之间的转换；使用了高斯-克里格投影进行大地坐标系与平面直角坐标系之间的转换。 |
| 8. | Firstly , the methods to restrain the effect of ship swing are studied for two - axes shipbome radar . two different methods based on ship rectangular frame and inertial frame are proposed separately according to consistence of radar base angle and beam angle
本文首先研究了舰载两轴雷达系统抑制船摇的方案，对雷达天线转角和波束转角一致和不一致的情况，分别提出了基于甲板坐标系稳定和基于大地坐标系稳定的不同方法。 |
| 9. | Considering the characters of 3 - axes coordinate system that is not included in ship rectangular frame or inertial frame , compensation conditions are deduced through studying the effects of ship - swing . the paper studies how to transfer line velocity and acceleration in the inertial frame to angular velocity and acceleration which correspond each axis , then gives the computer function scheme . servo control scheme which can overcome ship swing and realize moving - target accurate tracking is designed according to inconsistency of radar base angle and beam angle
针对三轴轴系既非甲板坐标系又非大地坐标系的特点，既研究了船摇对正交三轴雷达系统的影响，推导实现船摇不变性的补偿条件，又研究了将目标在大地坐标系中的线速度和线加速度滤波值折算到各轴对应的角速度和角加速度值的计算关系，并作出了计算机功能框图。 |
| 10. | Article 8 the state shall establish a nationwide unified geodetic coordinate system , plane coordinate system , vertical system , geocentric coordinate system and gravimetric system , and define the classification of orders and classes and precision of the national geodetic survey , as well as the national basic scale map series and their basic precision
第八条国家建立全国统一的大地坐标系统、平面坐标系统、高程系统、地心坐标系统和重力测量系统，确定国家大地测量等级和精度，以及国家基本比例尺地图的系列和基本精度。 |
