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本文论述了地震台网无线传输与电波信道的重要关系。指出在甚高频波段,利用地震系统现有的遥测设备,增加无线传输的距离和提高传输质量的关键在于改善电波信道。而选择合适的中转站址是改善电波信道的重要环节。这将有助于改善当前无线传输工作中的重要问题,能源与发送台址的矛盾。本文给出了在各种地形下的传播公式、估算方法及部份图表、供无线传输台网工作人员使用参考。并通过理论工程计算,对选址初步预测和对已选定而未投入使用的通讯点,可以做到传输效果的初步估计。
This paper discusses the important relationship between the seismic transmission network and the radio channel. It is pointed out that in the VHF band, the key to using the existing telemetry equipment of the seismic system to increase the wireless transmission distance and improve the transmission quality is to improve the radio channel. Choosing the right transfer station is an important part of improving the radio channel. This will help to improve the current wireless transmission of the important issues, energy and send the site of the conflict. This article gives the propagation formula under various terrains, estimation methods and some charts for wireless transmission network staff reference. And through the theoretical engineering calculation, the preliminary estimation of the site selection and the communication points that have been selected but not put into use can achieve the preliminary estimation of the transmission effect.