搜索结果: 46-60 共查到“知识库 天体测量学”相关记录294条 . 查询时间(5.504 秒)
Compact continuum source-finding for next generation radio surveys
image processing catalogues surveys continuum
2012/2/24
We present a detailed analysis of four of the most widely used radio source finding packages in radio astronomy, and a program being developed for the Australian Square Kilometer Array Pathfinder (ASK...
Distinguishing between a true period and its alias, and other tasks of model discrimination
Distinguishing alias model discrimination data analysis statistical surveys
2012/2/24
We consider the task of distinguishing between two different alternative models that can roughly equally explain observed time series data, mainly focusing on the period ambiguity case (aliasing). We ...
Modelling supermassive black hole growth: towards an improved sub-grid prescription
Modelling supermassive black hole growth sub-grid prescription
2012/2/24
Accretion onto supermassive black holes (SMBHs) in galaxy formation simulations is frequently modelled by the Bondi-Hoyle formalism. Here we examine the validity of this approach analytically and nume...
Southern Africa CTA Site Proposal
Southern Africa CTA Site Proposal air Cherenkov telescopes
2012/2/24
Southern Africa has some of the world's best sites for air Cherenkov telescopes. South Africa has only one viable site, which is south of Sutherland and also close to the Southern African Large Telesc...
The Electron Capture Decay of 163-Ho to Measure the Electron Neutrino Mass with sub-eV Accuracy and Beyond
electron neutrino mass electron capture decay 163Ho
2012/2/24
We have investigated the possibility of measuring the electron neutrino mass with sub-eV sensitivity by studying the electron capture decay of 163-Ho with cryogenic microcalorimeters. In this paper we...
2011 was a successful year for the GREGOR project. The telescope was finally completed in May with the installation of the 1.5-meter primary mirror. The installation of the first-light focal plane ins...
Electromagnetic follow-up of gravitational wave transient signal candidates
Electromagnetic follow-up gravitational wave transient signal candidates
2012/2/24
Pioneering efforts aiming at the development of multi-messenger gravitational wave and electromagnetic astronomy have been made. An electromagnetic observation follow-up program of candidate gravitati...
Gone with the Wind ON_Mars (GOWON): A Wind-Driven Networked System of Mobile Sensors on Mars
Gone the Wind ON_Mars GOWON Wind-Driven Networked System Mobile Sensors Mars
2012/2/24
We propose a revolutionary way of studying the surface of Mars using a wind-driven network of mobile sensors- Gone with the Wind ON_Mars (GOWON). GOWON is a scalable architecture that will allow in-si...
Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
Four Fundamental Foreground Power Spectrum Shapes Cosmology Observations
2012/2/24
Contamination from instrumental effects interacting with bright astrophysical sources is the primary impediment to measuring Epoch of Reionization and BAO 21 cm power spectra-an effect called mode-mix...
The Positioning System of the ANTARES Neutrino Telescope
ANTARES neutrino telescope detector alignment acoustic positioning calibration
2012/2/24
The ANTARES neutrino telescope, located 40km off the coast of Toulon in the Mediterranean Sea at a mooring depth of about 2475m, consists of twelve detection lines equipped typically with 25 storeys. ...
High Frame-rate Imaging Based Photometry, Photometric Reduction of Data from Electron-multiplying Charge Coupled Devices (EMCCDs)
Instrumentation high angular resolution image processing photometric Gravitational lensing micro
2012/2/24
The EMCCD is a type of CCD that delivers fast readout times and negligible readout noise, making it an ideal detector for high frame rate applications which improve resolution, like lucky imaging or s...
连线干涉系统测量共位双星宽带信号处理与分析
连线干涉 多星共位 同波束测量 差分相位时延
2013/4/9
随着人类空间活动的急剧增加，同步轨道资源已变得十分稀缺。为此人们采用了多星共位技术，来充分挖掘同步轨道资源。多星共位中，由于卫星存在位置漂移的情况，安全问题成为维护卫星正常工作必须考虑的问题之一。考虑到同步卫星的轨道特性，常采用三程测距的方式对卫星进行测轨，而且需要较长时间的测轨弧段。连线干涉测量可以获得高精度的差分相位时延，这对卫星在垂直视线方向上构成了很强的约束。给出了连线干涉测量系统设计及测...
抛物面天线微波全息测量及结果分析
抛物面天线 全息测量 天线面精度 测量精度
2013/4/9
就上海佘山 25 m 抛物面天线上进行的相位相关法微波全息测量及其测量结果做了一定阐述。文章首先简要提到了微波全息测量技术在国内外的发展情况以及理论依据，其次介绍了我们所建立的测量系统的组成，重点讨论了基于窄带信号测量工作的有效性和准确性，采用“自校准”的数据处理手段，对测量误差做了估计和实际测试。当前我们已经取得了 0.14 mm 的测量精度 (极限误差为 0.2 mm)，并分析了影响测量精度的...
Uncertainties in modeling low-energy neutrino induced reactions on iron group nuclei
Uncertainties modeling low-energy neutrino induced reactions group nuclei
2011/10/14
Charged-current neutrino-nucleus cross sections for 54,56Fe and 58,60Ni are calculated and compared using frameworks based on relativistic and Skyrme energy density functionals, and the shell model. T...