The ITU Radiocommunication Assembly considering a) that, in the case of some high-performance space systems involving satellites, ionospheric effects should be considered up to the highest frequencies in use; b) that various satellite systems, including mobile- and navigational-satellite services, are employing non-geostationary-satellite networks.
ITU-R QUESTION 218-4/3-2009由国际电信联盟 IX-ITU 发布于 2009-01-01。
ITU-R QUESTION 218-4/3-2009 在中国标准分类中归属于: M35 卫星通信设备。
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