共查询到19条相似文献，搜索用时 109 毫秒
1.
国内太阳数据VO化初步方案 总被引：1，自引：0，他引：1
随着太阳物理研究的深入、观测仪器的发展、观测数据的积累，促使人们去思考这样的问题：利用全世界不同时间、地点、波段的太阳相关数据、历史数据去对很多悬而未解的科学问题寻求答案，同时使研究者容易的去检索这些数据，进行分析，这就是虚拟太阳天文台要解决的问题，也是为什么虚拟太阳天文台项目得到了全世界有关天文台、研究所和大学的积极响应和运作。本文介绍了国内应如何面对虚拟天文台的发展及国内太阳数据VO化初步方案。 相似文献
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云南天文台Hα全日面望远镜是云南天文台太阳观测的主要仪器之一。经过十几年的运行,望远镜积累了大量的观测数据,并且这些数据还在以每天1～2Gbyte的速度增长。为了保存这些数据,便于进行数据共享,建立了Hα全日面观测数据服务系统。硬件方面,采用DAS+NAS的存储方案;软件方面采用PHP+MySQL的方案。本系统的基本功能包括数据存储、数据备份、数据查询和数据下载,并已经正常运行了半年左右。介绍了这一系统的设计方案和基本结构。由于这一系统更多的是为澄江1m红外太阳塔的有关系统的设计提供经验和参照,因此在文中相关部分初步讨论了某些针对澄江1m红外太阳塔有关系统的考虑。 相似文献
3.
白日视宁度监测仪和在抚仙湖的初步观测结果 总被引：1，自引：1，他引：0
报导了用南方基地云南天文台太阳差分像运动视宁度监测仪和美国国立太阳天文台的太阳闪烁仪,在云南省澄江县抚仙湖老鹰地红外太阳塔选址点进行的对比观测,简要地介绍了这两种视宁度测量方法的原理,对观测的初步结果进行了分析。 相似文献
4.
构建虚拟太阳天文台的中国数据结点 总被引：1，自引：0，他引：1
随着不断对太阳展开多波段观测以及Web Services等新兴IT技术的应用,虚拟太阳天文台(VSO)应运而生.它基于Web Services技术,是解决异地异构海量多波段数据访问和获取的一种有效工具.在将VSO技术实现的方法引入中国天文界、空间物理、地球物理等领域的基础上,以怀柔太阳观测站(HSOS)为基点,设计了怀柔数据结点,并实现了与VSO系统的整合,为中国其他站点联入VSO提供了实例. 相似文献
5.
本文简要介绍了云南天文台新建立的21cm波段快速(不中断采样)记录系统,及使用该系统观测到的快速尖峰事件。系统得到的太阳分米波段爆发中不同时间尺度的精细结构与Stu-rroch等提出的太阳耀斑中能量释放的模式相一致。 相似文献
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太阳多波段同时快速扫描光谱仪 总被引：1，自引：0，他引：1
本文报告了云南天文台太阳多波段光谱仪通过技术改造把传统的光谱仪优点和二维单色像组成的视而光谱仪优点结合起来,采取高精度扫描方法同时获得10波段光谱,使之发展成为一种新型的光谱仪——太阳三维光谱仪。这种三维光谱仪的优点是可快速得到活动区中每一点多条谱线轮廓,从而得到它的物理量场,并且可观测这些物理量场时间和空间上的演化。 文中介绍了太阳多波段快速扫描光谱仪的光学系统和为实现三维观测而研制的可控制高精度45°镜转台,具有不同画幅面的专用照像机以及微机控制的自动化电器系统,望远镜电控系统。 相似文献
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1990年5月23日0400—0451UT期间在遥隔两地的南大天文台与北师大天文台和北京天文台用时间分辨率1s和10ms分别在波长3.2cm、2cm和10.6cm上进行了太阳射电爆发的同时观测.发现了短厘米波爆发中的双重准周期脉动现象.本文根据这些观测资料连同S.G.D.发表的有关射电、光学和软X射线(SXR)耀斑等数据,提出了一个在耀(斑)环内非热与热辐射过程中由于相互作用而触发Alfven波和快磁声波的振荡模型,用来解释太阳短厘米波爆发中相关性很强的双重准周期脉动的起因和观测特征,并由此计算出爆发源区的平均物理参量T,N,B值。 相似文献
11.
M. L. Demidov 《Journal of Astrophysics and Astronomy》2000,21(3-4):209-212
A comparison is made of observational data on the mean magnetic field of the Sun from several observatories (a selection of
published information and new measurements). Results of correlation and regression analyses of observations of background
magnetic fields at the STOP telescope of the Sayan solar observatory in different spectral lines are also presented. Results
obtained furnish an opportunity to obtain more unbiased information about largescale magnetic fields of the Sun and, in particular,
about manifestations of strong (kilogauss) magnetic fields in them. 相似文献
12.
On astronomical seeing: The single Schlieren model 总被引：1，自引：0，他引：1
Ulrich Grossmann-Doerth 《Solar physics》1969,9(1):210-224
A model of astronomical seeing with particular view to solar observations is developed which assumes the atmospheric disturbances to consist of individual turbulence elements called Schlieren. A quantitative account is given of each image motion, image blurring and scintillation as function of Schlieren properties and telescope parameters. The theory permits to explain the observational results under conditions of good seeing; furthermore, it provides a basis for the discussion of the physical phenomena in the atmosphere that cause image deterioration. As an illustration it is shown how the theory could be applied to a problem of interest to solar astronomers searching for a suitable observatory site. 相似文献
13.
科学观测数据的海量增长,使得旨在实现资源互操作的虚拟观测台(VO)应运而生,并迅速受到相关学科的支持和重视。国际虚拟天文台联盟(IVOA)、行星科学数据系统(PDS)和空间物理归档检索抽取标准(SPASE)等数据组织,正加快制定数据管理模型,推动VO的发展和跨学科应用。结合空间科学应用研究的特点,在借鉴国内外天文和空间科学VO研究成果的基础上,提出了一种针对空间科学数据的Hybrid型VO体系结构,并基于此体系结构发展了一个支持同步收割、格式化管道和事件关联发现的空间科学VO原型。实践和应用结果表明,基于这种体系结构建立的VO在解决全局资源的实时同步、异构应用的高度集成和面向科学问题的数据发现等问题上,有一定的普适性。 相似文献
14.
A new radio spectropolarimeter for solar radio observation has been developed at Tohoku University and installed on the Iitate Planetary Radio Telescope (IPRT) at the Iitate observatory in Fukushima prefecture, Japan. This system, named AMATERAS (the Assembly of Metric-band Aperture TElescope and Real-time Analysis System), enables us to observe solar radio bursts in the frequency range between 150 and 500 MHz. The minimum detectable flux in
the observation frequency range is less than 0.7 SFU with an integration time of 10 ms and a bandwidth of 61 kHz. Both left
and right polarization components are simultaneously observed in this system. These specifications are accomplished by combining
the large aperture of IPRT with a high-speed digital receiver. Observational data are calibrated and archived soon after the
daily observation. The database is available online. The high-sensitivity observational data with the high time and frequency
resolutions from AMATERAS will be used to analyze spectral fine structures of solar radio bursts. 相似文献
15.
中国虚拟天文台可视化服务 总被引：1，自引：0，他引：1
虚拟天文台将使天文资料和相关资源的获取更加方便，阐述了可视化对虚拟天文台的必要性和重要性，着重说明了coneSearch界面可视化的内容以及实现方法和开发工具。 相似文献
16.
R. D. Bentley 《Earth, Moon, and Planets》2009,104(1-4):87-91
Heliophysics is a new discipline that studies of the effect of the Sun on the Solar System and spans a number of existing scientific domains—solar physics, heliospheric physics, and magnetospheric and ionospheric physics. In order to build a virtual observatory for heliophysics we have to find ways to conduct searches that span the domains and track the evolution of phenomena in 4 dimensions as they propagate through interplanetary space. To facilitate this it will be necessary to improve the quality of the metadata that are used in the search and to describe the observations. We describe some of the issues and how these can be addressed. 相似文献
17.
Numerical data processing is applied to the high-resolution images-of the solar corona obtained with the 20 cm coronagraph of the Pic du Midi observatory. Two complementary methods are proposed to solve some classical difficulties usually met in the morphological analysis of the solar corona, namely the brightness gradient in the inner and medium corona, the low contrast of numerous emissive regions and the superimposition along the line of sight of different structures. The methods which are described in this paper may help to resolve the complex coronal active regions into fine structures which is now necessary to interpret all observed corona data. 相似文献
18.
《天文和天体物理学研究(英文版)》2016,(4)
Pulsar timing uses planetary ephemerides to convert the measured pulse arrival time at an observatory to the arrival time at the Solar System barycenter(SSB). Since these planetary ephemerides cannot be perfect, a method of detecting the associated errors based on a pulsar timing array is developed. By using observations made by an array of 18 millisecond pulsars from the Parkes Pulsar Timing Array, we estimated the vector uncertainty from the Earth to the SSB of JPL DE421, which reflects the offset of the ephemeris origin with respect to the ideal SSB, in different piecewise intervals of pulsar timing data, and found consistent results. To investigate the stability and reliability of our method, we divided all the pulsars into two groups. Both groups yield largely consistent results, and the uncertainty of the Earth-SSB vector is several hundred meters, which is consistent with the accuracy of JPL DE421. As an improvement in the observational accuracy, pulsar timing will be helpful to improve the solar system ephemeris in the future. 相似文献
19.
周树荣 《紫金山天文台台刊》1998,17(4):1-7
本文介绍了日食射电观测及其资料预处理的基本方法。其中包括日食观测点的选址、观测前的准备、日食观测和食后资料的预处理等。通过资料预处理 ,可得到归一化天线温度和斜率食变曲线 ,为研究日面亮度温度分布和射电源参数等基本物理量提供基本数据和资料 相似文献