研究改进了对自然卫星CCD图像进行定位量测处理的方法。
Some methods of reduction for positioning measurement of the natural satellites on the CCD images have been studied and presented in this paper.
《自然》杂志的科学家们研究了世界上22万座高山冰川20年来的卫星数据，发现自2015年以来，冰川上每年减少的冰雪总量为2980亿公吨。
Scientists, from Nature studied 20 years of satellite data of the world's 220,000 mountain glaciers, and found that since 2015, glaciers have last 298 billion metric tons off ice and snow per year.
伊朗说它发射自己的卫星进入轨道的目的是监视自然灾害和改进通讯，伊拉克是一个地带多发的国家。
Iran has said it wants to put its own satellites into orbit to monitor natural disasters in the earthquake-prone nation and improve its telecommunications.
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