摘要
GPS相对定位原理是在SA和AS政策的条件下,为提高定位精度而产生和发展起来的。2005年以来,美国政府已取消了SA和AS政策,但是GPS的相对定位技术依然有广泛的应用,如飞行编队或导弹相对于已知目标的相对位置等。本文从GPS基于伪距定位的基本公式出发,逐步推导出在已知卫星星历、伪距的条件下,得出移动目标相对于一个已知目标的相对位置,从而求出其他的相关的数据;从实际的数据处理得出的结果可以看出误差在1m左右。同时推导过程及最终结论为计算机的程序设计提供了具体的方法,方便了程序的开发。
GPS relative position is to appear and develop for improving the accuracy of positioning on the condition of the principle of SA and AS policy However, since 2005, the U. S. government has lifted SA and AS policies, and GPS relative position technology still has a wide range of applications, such as formation flight or missile relative position to the known objectives so on. In this paper, I base on the basic formula of GPS pseudo-range positioning gradually derived known in the satellite ephemeris, pseudo-range of conditions, come to the relative postion of a moving target opposed to a kown target so as to obtain other relevant data. From the acrual results of data-processing we can conclued that the errors can be seen in the lm or so. At the same time, the process of derivation and the final conclusion provide a method for computer programming.
出处
《电子测试》
2008年第12期16-19,共4页
Electronic Test
关键词
GPS伪距
单差
相对定位
GPS
pseudo-range
signal-difference
relatively positioning
