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the infrared astronomical satellite iras, launched in 1983 to perform a sky survey at wavelengths ranging from 8 to 120 micrometres, was operational during the 10 months in a sun synchronous orbit near an altitude of 900 kilometres.
125. 红外天文卫星于1983年发射,以波长8至120微米进行天空观察,在900公里高度的太阳同步轨道上运行了10个月。
such a sensor should be expected to measure particles of around 100 micrometres to 1 millimetre in size, and should have the advantage of allowing real-time detection while traditional surveys are performed on spacecraft retrieved a few years after impact.
这一传感器有望测量到大小约100微米至1毫米的粒子,并具有实时探测的优势,而对发生撞击几年后才收回的航天器则进行传统测量。
45. for standardization purposes, 32-250 micrometres and >250 micrometres are recommended as size criteria for meio- and macro-fauna analyses, respectively (isba/18/ltc/6).
45. 为了实现标准化,建议分别将32-250微米和大于250微米列为小型底栖生物和大型底栖生物分析的尺寸标准(isba/18/ltc/6)。