A Long March-4C launch vehicle launched three satellites, Gaofen-1 02, Gaofen-1 03 and Gaofen-1 04, from the Taiyuan Satellite Launch Center in Shanxi Province, north China, on 31 March 2018, at 03:22 UTC (11:22 local time). The three optical Earth-observations satellites started the operation of China’s first commercial satellite constellation, expected to make contribution to such areas as disaster relief, environmental protection, urban and rural construction. Gaofen satellites were developed by the Chin
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