Estimation to ground emitters of space - borne sparse l - array is provided , and the simulation results obtained prove that such arrays are good at high accuracy direction - finding 分析了典型结构稀布阵对地面辐射源的测向性能及测向的实时性问题,所得结果表明5元稀布l阵能够实现对地面辐射源的实时高精度测向。
Due to the limitation of virtual load , the space - borne arrays are commonly chosen to be sparse ones . so , analysis of the direction - finding ability to the ground emitters is particularly important 由于受到有效载荷的限制,星载接收阵列一般采取稀疏阵,因此分析稀疏阵对地面辐射源的测向性能具有重要的现实意义。
First , the apparatus of spectral irradiance calibration is set up , and ultraviolet spectrum band uses a standard lamp offered by standard metrological institute of china , while vacuum ultraviolet spectrum uses a deuterium transfer lamp 地面辐射定标分为光谱辐照度定标和光谱辐亮度定标。光谱辐照度定标中选用了卤钨灯作为250nm 400nm标准光源,氘灯作为200nm 300nm的传递光源。
The heat supply s stem of terrestrial surface radiation of low temperature hot water has been more and more widely used in architectural heat supply because of its comfort , cleanness , health care , limited size , heat stability and efficient energy - saving character 摘要低温热水地面辐射供暖系统由于其舒适、卫生、保健、不占面积、热稳定性好、高效节能等优点已越来越多地在建筑供暖中得到推广应用。
In addition to the fixed ground - based radiation monitoring network , aerial and mobile ground surveys will be conducted to determine whether there is radioactive material over hong kong , and if so , the extent of its spread and whether any parts of the territory have been contaminated 除了使用辐射监测网络外,天文台更会在境内进行空中及地面辐射巡测,以确定本港是否受放射性物质影响,并进一步侦测其污染程度及分布情况。