[2] ITU_R,P834_3 Effects of tropospheric refraction on radiowave propagation.ITU_R, Recommendations Radio WavePropagation[M].Volume 2000,P series_Part1,2001:231.
[3] Smith, W.L. Notes on the relationship between total precipitable water and surface dew point[J]. Journal of AppliedMeteorology,1966(5):726-727.
[6] Hopfield H S. Troposphere effect on electromagnetic measured range:Prediction from surface weather data[J].RadioScience,1971, 6(3):357-367.
[7] G D Thayer.A modified equation for radio refractivity of air[J].Radio Science,1974(10):803-807.
[9] Niell, A.E. Preliminary evaluation of atmospheric mappingfunctions based on numerical weather models[J]. Physicsand Chemistry of the Earth,2001(26):475-480.