that a continuing need is envisaged for space experiments for research of the neutral and ionized that the conclusions drawn in Report 456 indicate the necessity for certain frequencies in order to that to measure differential Doppler effect, use should
ITU-R SA.513-1-1986由国际电信联盟 IX-ITU 发布于 1986-07-01。
ITU-R SA.513-1-1986 在中国标准分类中归属于: M04 基础标准和通用方法,在国际标准分类中归属于: 33.060.20 接收和发射设备。
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