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影响雷达测量目标高度的主要因素有两个,一个是地球曲率,一个是大气折射。大气折射的指数模型可以更真实的反映大气分布。目标高度测量的实质是对大气折射进行修正。在实际应用中,与高度拟合法和改进高度拟合法相比,基于指数模型的等效地球半径法求得的修正量可以获得相对较好的平滑度,这对于稳定雷达系统误差具有积极的意义。
There are two main factors that affect the height of a radar target. One is the curvature of the earth and the other is the refraction of the atmosphere. The exponential model of atmospheric refraction can more accurately reflect the atmospheric distribution. The essence of target height measurement is the correction of atmospheric refraction. In practical application, compared with the height fitting method and the improved height fitting method, the equivalent earth radius method based on the exponential model can obtain a relatively good smoothness, which has a positive meaning for stabilizing the radar system error .