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  • 谢腾飞, 杨雪亚, 朱伟. 基于实测地形的米波雷达测高方法[J]. 雷达科学与技术, 2021, 19(1): 74-78.    [点击复制]
  • XIE Tengfei, YANG Xueya, ZHU Wei. VHF Radar Height Measurement Method Based on Measured Terrain[J]. Radar Science and Technology, 2021, 19(1): 74-78.   [点击复制]
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基于实测地形的米波雷达测高方法
谢腾飞,杨雪亚,朱伟
0
(1.中国电子科技集团公司第三十八研究所,安徽合肥 230088;2.孔径阵列与空间探测安徽省重点实验室,安徽合肥 230088)
摘要:
基于二次雷达高度信息对地形参数进行优化的合成导向矢量算法对米波雷达测高具有较高的精度,但在没有二次雷达信息的情况下,测高精度较低。鉴于此,本文提出了一种基于实测地形的测高方法,首先对目标方位的地形起伏进行遍历,通过球面模型计算得到对应的反射点距离,将其与真实反射点距离差值最小的位置作为真实的反射点位置,然后将其距离和地形高度用于合成导向矢量算法测高,文中并给出了减小运算时间的优化算法流程,实测数据验证了该方法的有效性。
关键词:  实测地形  多径信号  测高  合成导向矢量
DOI:10.3969/j.issn.1672-2337.2021.01.012
基金项目:
VHF Radar Height Measurement Method Based on Measured Terrain
XIE Tengfei, YANG Xueya, ZHU Wei
(1.The 38th Research Institute of China Electronics Technology Group Corporation, Hefei 230088, China; 2. Key Laboratory of Aperture Array and Space Application, Hefei 230088, China)
Abstract:
The synthetic steering vector algorithm, which optimizes the terrain parameters based on the secondary radar height information, has high accuracy for the VHF radar height measurement. However, the measurement accuracy will be low without the secondary radar information. In view of this problem, an altimetry method based on the measured terrain is proposed. In this method, the terrain at the target azimuth is traversed, the corresponding reflection point distance is calculated through the spherical model, and the position with the smallest distance difference from the real reflection point is taken as the real reflection point position. Then the distance and terrain height are used in the synthetic steering vector algorithm for height measurement. The optimized algorithm flow to reduce the calculation time is also given. The measured data verifies the effectiveness of the proposed method.
Key words:  measured terrain  multipath signal  height finding  synthetic steering vector algorithm