实测大气模型下雷达定位公式的解析式兼论有效地球半径
Analytical Formulae of Radar Location for Measured Atmospheric Model with Discussion on Effective Earth Radius
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摘要: 实测大气模型,只能用多个线性成层大气模型的总和来代表。据此导出了实测大气模型下,目标视在距离的精确解析求和式。从而当初始视在仰角为零时,可得到目标视在距离的精确解。该文指出,使用中值近似是获取大气折射精确解的一种途径,而且通过积分中值近似可导出有效地球半径。对有效地球半径的推导方法和应用进行了讨论。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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