ITU-R REPORT M 1186-1990 Use of frequency band 4 200 MHz to 4 400 MHz by radio altimeters《无线电高度表对频段4200兆赫兹至4400兆赫兹的测量》.pdf

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ITU-R RAPPORT M 766-2 FRENCH-1990 Feasibility of frequency sharing between the GPS and other services《全球定位系统和其他服务之间的频率共享的可行性》.pdf

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