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我国返回式遥感卫星研究虽然从上世纪60年代就已经开始起步了,但是,由于当时正处于文化大革命的动乱时期,研制进度和发射计划一再拖延,直到1974年才初步具备了发射条件。
Although the researches on China’s remote sensing satellites have started to take off since the 1960s, the development schedule and firing plan were delayed for some time during the turmoil of the Cultural Revolution until 1974, when the initial launch conditions were met.