An Efficient Algorithm for Radar PPI Display

Since the radar display system on PPI needs showing a large amount of data of the original radar echo, and spends much time, the paper analyzed the traditional PPI algorithm, compared the time consumed by several chief functions called by drawing process, and suggested several way to improve efficiency of the PPI display process, then discussed the efficient display algorithm on PPI developed by author. The paper mainly explained several chief contents in the algorithm with example code, they are the clip method used in scaling and translation, the arc segment scan method used in outer scanning, the method to improve efficiency of drawing the line segment in inner scanning, finally compared and listed the actual running time of different algorithm.