This paper mainly studies the extraction of high-altitude targets, particularly for airspace object because of the gray level difference of target and background.

本文主要研究对空域目标的提取，针对空域目标和背景特殊的灰度差异性对目标进行分离。

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Through theory analysis and simulation, this article presents a new method of low altitude target detection and tracking, based on high distance resolution technology.

本文以高距离分辨率技术为基础，通过理论分析和仿真，寻找一种解决低空目标探测与跟踪的新途径。

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These are compared with simulating plates of target contour, wind tunnel test data, high altitude test data. Good flow field quality is given for the typical engine.

将这些技术参数和图谱与模拟板的目标图谱数据、风洞吹风试验数据及高空台试验推算结果进行了综合分析与对比，较完整地表述了发动机进口的流场品质。

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