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金属增感屏底片系统实验研究 被引量:2
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作者 胡美俄 吴建华 +4 位作者 刘瑞根 肖智强 刘大敏 胡八一 谷新新蓉 《光子学报》 EI CAS CSCD 北大核心 2002年第0Z2期268-270,共3页
对金属增感屏底片图像接收系统特性进行了研究。利用^60Co同位素γ光子源,研究了金属增感屏底片系统的X-D曲线和噪声特性。研究结果表明,照射量X-黑密度D关系曲线基本呈线性,有效黑密度范围一般在0.5-3.0左右。底片噪声随黑密度的增... 对金属增感屏底片图像接收系统特性进行了研究。利用^60Co同位素γ光子源,研究了金属增感屏底片系统的X-D曲线和噪声特性。研究结果表明,照射量X-黑密度D关系曲线基本呈线性,有效黑密度范围一般在0.5-3.0左右。底片噪声随黑密度的增大略有增大,一般噪声偏差为0.016(黑密度计扫描孔径为0.03mm×0.2mm)。在12MeVLIA直线感应加速器的轫致辐射X光源上,对底片系统的空间分辨能力进行了实验研究,对钨台阶样品照相的实验表明,在X光源“零模糊”的条件下,台阶图像在边界处展宽仅为1mm,由此条件下,对边界的定位精度一般可达到0.1mm以下。 展开更多
关键词 图像接收系统 实验研究 金属增感屏底片系统 闪光照相 X射线照相 流体动力学 噪声特性 黑密度
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Information Service System for Receiving and Processing Multi Source Remote Sensing Images
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作者 GUO Xiarui NING Wei HU Gang 《Aerospace China》 2016年第4期41-46,共6页
Based on international requirements for the application of commercial remote sensing data,an information service system for receiving and processing multi source remote sensing data was developed and introduced.The sy... Based on international requirements for the application of commercial remote sensing data,an information service system for receiving and processing multi source remote sensing data was developed and introduced.The system consists of an Oversea Fixed Ground Service Station(OFGS),a Transportable Vessel-Borne Service Station(TVBS) and a Data Operation and Management Center(DOMC).Fixed and transportable service stations were developed in Venezuela,Latin America and for the China's Xuelong polar research vessel respectively,and serve the function of remote sensing data receiving,processing and application.The DOMC connects the OFGS and TVBS,so that they constitute a network to provide receiving,distribution,retrieval,browsing,ordering,and downloading functions for multi remote sensing satellite data and products.It validates the competence in providing 40 kinds of typical application products.The development of this system provides a reliable and comprehensive service for commercial remote sensing data applications for users both in domestic and oversea markets. 展开更多
关键词 Remote sensing Commercial aerospace Satellite application
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