雷达嵌入式大气折射修正仪

Embedded Atmosphere Refraction Corrector for Radar

大气折射效应是影响雷达精确定位和测速的主要误差源之一。为了提高雷达的探测精度,通过建立全国各地地面折射率与空中大气折射率剖面的相互关系,以及选择较高精度的折射误差修正方法,设计了一种由地面折射率仪、全国大气折射率剖面与地面大气折射率关系数据库、数据处理单元和雷达数据接口等组成的雷达嵌入式大气折射修正仪。仿真结果证实,采用雷达嵌入式大气折射修正仪后,不仅可使大气引起的雷达折射误差修正精度提高到94%以上,而且具有实时、快速等特点。该设备可直接应用到在役雷达系统和正在生产的雷达中,以提高雷达的探测精度。

Atmospheric refraction effect is one of the major error sources which affect the precise orientation and velocity measurement of radar. In order to improve the detection precision of radar, the relationship between the surface refractivity of different regions and the profile of atmospheric refractive index is established, a refraction error correction method which has a better precision is selected, and then a embedded atmosphere refraction errors corrector is designed which is based on the surface refractivity instrument and the database of relationship between the National atmospheric refractive index and the surface atmospheric refractivity, the data processing unit and the radar data interface, etc. Simulation results show that the accuracy of refraction error correction can be improved up to 94% by using the radar embedded atmosphere refraction error corrector which features real time and rapidity. It can be applied to the radars which are on service and the ones which are being produced to improve the detection precision.