共查询到19条相似文献,搜索用时 875 毫秒
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X射线实时成像系统在无损检测中的应用 总被引:3,自引:0,他引:3
叙述X射线实时成像系统的基本构成和检测原理,详细介绍了计算机数字图像处理的一些常用方法,同时对我厂使用的X射线实时成像检测软件进行了介绍,并总结了X射线实时成像系统的检测特点。 相似文献
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简要介绍了成像链、成像系统和遥感系统的概念;对像质和像质差异的表征和度量、成像系统性能的表征等予以说明;重点探讨航天光学采样成像系统MTF的优化设计与MTFC问题,并给出讨论结果。 相似文献
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航天光学采样成像系统MTF的优化设计与MTFC 总被引:2,自引:1,他引:1
简要介绍了成像链、成像系统和遥感系统的概念;对像质和像质差异的表征和度量、成像系统性能的表征等予以说明;重点探讨航天光学采样成像系统MTF的优化设计与MTFC问题,并给出讨论结果。 相似文献
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小卫星高分辨率成像系统 总被引:1,自引:0,他引:1
对小卫星对地观测高分辨率成像系统进行了综述。介绍了国内外有极高分辨率(0.5~1.0m)、高分辨率(1.8~2.5m)和中高分辨率(4-10m)小卫星光学成像系统的性能,并与合成孔径雷达(SAR)成像系统进行了比较。给出了小卫星光学成像系统、SAR高分辨率成像系统和卫星平台的关键技术。讨论了未来小卫星及其高分辨率成像系统技术的发展趋势。 相似文献
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景物和成像条件对遥感图像品质的影响 总被引:2,自引:0,他引:2
遥感图像是遥感数据获取系统的输出,遥感图像的品质表现为遥感图像在完成遥感任务中的应用价值。遥感图像品质由成像链的状态和性能决定。成像链包含景物、成像条件和成像系统的所有组成部分。文章介绍光学遥感情况下,景物和成像条件对遥感图像品质的影响,包括景物特性和成像条件的表征,及其对遥感图像品质影响的分析。同时,指出了针对景物和成像条件,在成像系统设计和运行等方面需注意的问题。 相似文献
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航天遥感科学技术的发展 总被引:7,自引:4,他引:3
简要说明了航天遥感和航天遥感系统的概念和组成,特别对航天光学遥感成像链、成像系统和遥感系统的概念和组成做了论述,重点介绍了航天遥感科学技术的发展现状和发展方向,同时提出了发展我国航天遥感科学技术的若干建议。 相似文献
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Alois Sieber 《Acta Astronautica》1984,11(1):15-31
(Examples of the application of radar to remote sensing via satellite) Europe, the United States of America, Canada and Japan are planning future space missions which will carry Synthetic Aperture Radar (SAR) systems as key sensors for remote sensing purposes. These systems are dedicated to application areas which cover nearly all Earth sciences from oceanography to agriculture.This paper introduces the measurement principles. The main emphasis is put on the usefulness and limitations of these techniques. Examples from airborne measurements as well as space-borne missions much as SEASAT and SIR A (Shuttle Imaging Radar) are presented. 相似文献
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The Imaging Spectrometer Data Analysis System (ISDAS) is being developed by the Canada Centre for Remote Sensing and MacDonald Dettwiler and Associates on Sun Microsystems SPARC workstations using the Application Visualization System (AVS) software package to meet the requirements for efficient processing and analysis of hyperspectral data acquired with airborne as well as future spaceborne sensors. Various visualization tools have been developed for rapid exploratory analysis together with preprocessing and information extraction tools for numerical analysis. Linkages to a spectral database and a conventional image analysis system were established to support the analysis. ISDAS is being used for multidisciplinary applications development in areas such as agriculture, environment, and exploration geology using physically based analysis approaches to retrieve information from hyperspectral data. This continuing effort, in collaboration with industry will lead to streamlined procedures that are important to take hyperspectral satellite remote sensing towards an operational mode. 相似文献
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MIRAS is the Microwave Imaging Radiometer with Aperture Synthesis developed under ESA contract, in order to image the ground soil moisture and the ocean salinity from low Earth orbit.
High potential exists for application of this technology in space at low frequency, but low frequency means high antenna dimmensions with potential difficulties in terms of radiating elements correlation and measurements stability.
Based on the foreseen difficulties, ESA envisages a reduced size intermediate instrument compatible with small satellites which is named MIRAS demonstrator.
This paper presents the implementation of the MIRAS antenna demostrator on a Spanish MINISAT platform.
MINISAT programme of small satellites is part of the Spanish National Space plan. The first element of the serie (MINISAT 01) will be launched in December-96. 相似文献
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文中简要阐述了光学遥感器星上定标的重要性,分析了光学遥感器星上定标的现状,重点介绍了增强型主题绘图仪(ETM)、中分辨率成像光谱仪(MODIS-N)、中分辨率成像光谱仪(MERIS)、可见/红外成像辐射计(VIRI)和红外多光谱扫描仪(IRMSS)等几个光学遥感器上的几种新的、典型的星上定标系统。最后,对星上定标的发展趋势进行了概括。 相似文献
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Alan Marshall 《Space Policy》1995,11(1)
This article analyses established models of imperialism and seeks to apply them to possible space development scenarios. Inherent in such an analysis is a critique of the predominant rationales for advanced Solar System development (permanent planetary bases, settlements and colonies). The argument that emerges suggests that no single rationale is sufficiently strong to propel humans towards Solar System expansion as yet. However, in the instance that an extraterrestrial material becomes economically valuable, Solar System development will probably proceed. Under this scenario the present politico-legal regimes which govern prospective space development (and, moreover, the philosophical inclinations of many of those involved in formulating such regimes) dictate that Solar System development will be of an imperialistic nature. 相似文献
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利用雷达高度计、微波散射计、海洋波谱仪和合成孔径雷达SAR(Synthetic Aperture Radar)观测海面风、浪等海洋动力环境要素的技术已经日趋成熟,针对现有单星多传感器体制存在的重量大、稳定性差、功耗高、整星系统复杂等缺点,首先对以上四种海洋微波遥感器的发展和应用情况进行了梳理,随后根据目前的发展趋势,提出了一种新的多模式一体化设计方法并进行详细描述,最后,对未来星载海洋微波遥感器的多模式一体化技术进行了展望,为今后海洋微波遥感器的多模式一体化研究提供参考。 相似文献
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