基于3R及大气折射修正的目标高度定位精度研究

Study on the Locating Precision of Target's Height Based on 3R and the Atmospheric Refraction

雷达测得的距离信息不需要转化,可直接用于目标定位,具有较高的精度,但高空中的大气折射会给测距带来干扰,降低目标的定位精度。本文利用3R定位模型确定出目标的理想空间位置;与考虑大气折射影响后进行改进的等效地球半径模型相结合,进行海拔高度的求解;将三站计算的海拔高度进行不同的加权处理,得出目标处于不同高度下的大气折射修正值。仿真结果表明,该方法改善和提高了系统对目标的定位精度,进一步增强了系统的作战能力。

The high precision o distances that measured by radars f target locating can be achieved by directly using the information of with no transformations in application. The locating precision of tar- get can be reduced by the interference of atmospheric refraction in distance measurement. But atmos- pheric refraction reduced the locating precision with the interference brought into measuring. Using the locating model of 3R, the target＇s ideal spatial position can be gained. Then, combined with improved equivalent earth-radius refraction model which has taken atmospheric refraction into consideration, the height above sea level can be solved. Finally, by weighting the heights calculated by three stations through different methods, the atmospheric refraction modified value of target in different height can be achieved, the simulation shows that the locating precision has been improved, and the system＇s fighting ability also been ulteriorly enhanced.