Radio transmission system for high-speed mobile unit

摘要: A high-speed mobile unit (110) has a first communication part (101) for transmitting image data, which is obtained by pickup performed an (103), via radio wave of frequency (f1) when the receives control data from ground-based station (200) (f1); and second (102) similarly (f2). Ground-based stations each have (201) indicative transmission timing predetermined frequency. (200a, 200b,...) communicate every other one waves frequencies (f1, f2). center (300) selection (302) selecting, there exist, among received (200), plurality same (103) at time, data.