實測大氣模型下雷達定位公式的解析式兼論有效地球半徑
Analytical Formulae of Radar Location for Measured Atmospheric Model with Discussion on Effective Earth Radius
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摘要: 實測大氣模型,只能用多個線性成層大氣模型的總和來代表。據(jù)此導出了實測大氣模型下,目標視在距離的精確解析求和式。從而當初始視在仰角為零時,可得到目標視在距離的精確解。該文指出,使用中值近似是獲取大氣折射精確解的一種途徑,而且通過積分中值近似可導出有效地球半徑。對有效地球半徑的推導方法和應用進行了討論。Abstract: The measured atmospheric model can only be represented as sum of spherical linear stratified models. Then the formula of apparent range of target is derived as sum of analytical expressions.When the initial elevation angle equals zero, therefore the accurate solution of apparent range of target can be obtained, It is indicated in this paper that effective earth radius can be introduced by using median value approximation of integration, which is also an effective technique to obtain accurate solution of atmospheric effects on radio wave propagation, Application of effective earth radius and methods to derive it are discussed.
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