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A Long March-4B launch vehicle launched the Gaofen-7 Earth-observation satellite from the Taiyuan Satellite Launch Center, Shanxi Province, northern China, on 3 November 2019, at 03:22 UTC (11:22 local time). According to the China National Space Administration (CNSA): Gaofen-7 (高分七号) is “China’s first civil-use optical transmission three-dimensional surveying and mapping satellite that reaches the sub-meter level”. The satellite “can draw stereoscopic maps with an error of less than one meter for the topog
