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一枚阿里安娜40火箭应于1998年3月20日夜间至21日从圭亚那空间中心升空以便把法国的Spot-4卫星送入822km高的极地轨道。这颗卫星重2755kg,其中1390 kg为有效载荷(高分辨率可见光/红外摄像机和植被探测仪)和五种搭载的仪器。该卫星使用由马特拉马柯尼空间公司研制的新
One Ariane 40 rocket was to be launched from the Guyana Space Center on the night of 21 March 1998 to the 21st in order to send France’s Spot-4 satellite into the 822-km-high polar orbit. The satellite weighs 2755 kg, of which 1390 kg are payloads (high-resolution visible / infrared cameras and vegetation detectors) and five equipped instruments. The satellite uses a new developed by Matra Makeni Space Company