ITU-R PI.684-1990
在频率500 khz以下场强的预测.第6D节.频率1.6 MHz以下电离层传播的预测

Prediction of Field Strength at Frequencies Below About 500 khz - Section 6D - Ionospheric Propagation Prediction at Frequencies Below About 1.6 MHz

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标准号

ITU-R PI.684-1990

发布日期

1990年01月01日

实施日期

废止日期

无

中国标准分类号

M04

发布单位

IX-ITU

适用范围

The CCIR, Considering (a) that there is a need to give guidance to engineers for the planning of radio services in the frequency band below about 500 kHz; (b) that methods developed for the estimation of field strength at frequencies below about 500 kHz are described in Reports 265 and 895, while, on the other hand, different methods which have been developed for the frequency band 150-1705 kHz are described in Report 575.