一种改进的雷达模拟器回波图像生成算法

针对现有雷达模拟器回波图像生成算法的不足，提出一种改进算法.该算法通过Vincenty公式将岸线地理坐标转换为平面坐标，有效解决了使用墨卡托投影坐标生成回波图像的变形问题，使方位距离的解算更加精确.采用一种RDP（Ramer-Douglas-Peucker）改进算法对岸线数据进行简化，提高了雷达模拟器岸线回波图像绘制效率.利用瑞利、韦伯、均匀分布模型对雷达杂波进行建模仿真，采用基于计算机图像裁剪的杂波生成与显示方法，较好地实现了杂波的圆周实时扫描.基于上述方法开发了JRC-JMA-9100系列雷达模拟器，比较结果表明，仿真效果良好.
Aiming at the deficiency of algorithm of the radar simulator echo images generation, a modified algorithm was proposed, in which the geographical coordinates of the shoreline was transformed into plane coordinates by Vincenty’s formula, as result effectively solved the image deformation problems by using the Mercator projection coordinates to generate radar image and made the orientation and distance calculation more accurate. The modified RDP (Ramer-Douglas-Peucker) algorithm was used to simplify the shoreline data, which improved the rendering efficiency of radar images. The Rayleigh, Weibull and uniform distribution model were used to modelling and simulation of radar clutter. By a method of the clutter image generation and display based on computer image cropping, a better clutter and circumferential scanning was achieved. On the basis of the above algorithm, the JRC-JMA-9100 series radar simulator with better simulation results is developed.