【摘要】 本文讨论了我国大气折射指数梯度的分布值及其对BPL地波时号的二次相位因子的影响.采用了我国102个高空气象站十年的实测资料,求得了我国大气折射指数梯度的月平均值.根据这些数值绘制了春秋季、夏季和冬季的《中国大气折射指数梯度分布图》.用这种方法计算的地波时延预测值与地波时延的实测值做了比较,结果表明,本文提供的修正值比标准大气的修正数据更接近实测值.更多还原

【Abstract】 In this paper, the distribution parameters for atmosphere refraction index gradient in China and the influence on BPL ground wave time signal are discussed. According to the information mesured by Chinese 102 upper-atmosphere observing station, we have calculated the data of the atmosphere refraction indx gradient, and drawn the distribution maps of the all seasons atmosphere refraction index gradient in China. The data on the refraction index gradient in some typical regions that influnce BPL time signal are calculated, and compared with the mesured data. Results show that the calculated secndary factors in this paper are more approximate the mesured values.更多还原