热带丛林地区战术天波通信电路设计综合算图

Nomograms for Tactical Skywave Communicaton in Tropical Forest Regions

本文给出一套适用于我国热带丛林地区的战术（１００ｋｍ内）天波通信电路设计综合算图。它可以通过图上作业迅速计算热带丛林环境中天波传播接收场强、发射功率、最低可用频率、电离层吸收．大气天线电噪声场强等。还可以计算丛林叶丛覆盖损耗，丛林中的水平偶极天线的增益损耗，太阳天顶角等。

In this paper,nomograms designed for taCtical skywave communication in tropical forest regions inChina are presented. Using the nomograms,the receiving field strength,the transmitting power, the lowest usablefrequency,the ionospheric absorption and the atmospherics can be found conveniently.The attenuation due to foliages,the loss of dipole gain in the forests and the zenith angle can also be deduced.